43 jobs found

We are working with a well-established, multidisciplinary consultancy to appoint a Principal Sustainability Consultant to join their growing sustainability team in Cardiff. This is a senior, client-facing role offering the opportunity to lead complex projects across the built environment and play a key role in shaping sustainability strategy and delivery. The Role This is a varied and influential position suited to an experienced sustainability professional who enjoys combining technical leadership with project and team management. The successful candidate will take ownership of sustainability delivery on medium to large-scale projects across all RIBA stages, while also supporting wider team development. Key responsibilities include: Acting as Sustainability Discipline Project Lead on medium to large projects, including supporting outline and detailed planning submissions Leading sustainability workstreams on major projects, supporting senior leadership on delivery Developing and coordinating project programmes and resource plans Leading client and design team workshops, clearly communicating technical and strategic sustainability advice Delegating, managing, and reviewing technical work produced by junior team members Delivering and overseeing a range of technical sustainability assessments, including: Energy performance modelling (Part L, Part O, thermal comfort, operational energy) BREEAM and other environmental and wellbeing certifications (e.g. HQM, WELL) Energy strategies to support planning and design development Whole life carbon assessments and Net Zero carbon strategies Contributing to internal technical excellence initiatives to maintain industry-leading capability Mentoring and developing junior consultants in technical delivery and project management Required Experience & Core Competencies Applicants are not expected to cover every area below, but should demonstrate depth in key focus areas and a willingness to broaden expertise. Essential experience includes: Energy and building performance consultancy, including advanced simulation work Building Regulations Part L (Elmhurst and/or IES) Part O and thermal comfort assessments Proven experience leading projects and managing resources Experience mentoring and developing junior consultants Delivery of environmental and wellbeing certifications (e.g. BREEAM, HQM, WELL) at design and post-construction stages Whole life carbon assessments, ideally using platforms such as One Click LCA Experience supporting successful planning applications and working with local authorities Desirable Experience Operational energy modelling (e.g. CIBSE TM54, NABERS UK, Passivhaus / PHPP) Development of holistic sustainability strategies and implementation plans Environmental impact assessment related to climate change and carbon Circular economy statements Fee proposal development Line management experience About You Currently operating at Principal level (or equivalent) within sustainability consultancy Degree-qualified in a relevant discipline with a strong technical foundation Professionally registered and working towards Chartership (Chartership advantageous) Confident leading workshops and engaging with multidisciplinary design teams Strong communicator with a collaborative, team-oriented approach Motivated by delivering genuinely impactful sustainability outcomes This role offers the opportunity to join a respected consultancy at the forefront of

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal Mechanical Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of complex fluid systems, shaping designs that meet demanding performance and environmental requirements Create and review high-value engineering deliverables - for schematics and P&IDs to calculations, system descriptions, and 3D models Drive advanced system analyses , including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks), ensuring it meet tough submarine operating environments Champion technology integrity by reviewing supplier documentation, ensuring full compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints Influence design quality and safety, contributing to reviews, hazard studies, verification activities, and resolution of technical issues, modifications, and non-conformances Your skills and experiences: Essential: Educated to degree level, with Chartered Engineer status highly desirable Solid background in mechanical, marine, process, or fluid systems engineering gained with a complex or highly regulated environment Strong knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis , and system performance modelling Demonstrated technical expertise in the design, analysis , and integration of both compressible and incompressible fluid systems Desirable: Experience using industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Mechanical Engineering Discipline team: This is an exciting opportunity to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer, where you'll serve as a technical specialist for some of the submarine's most critical compressible and incompressible fluid systems. In this role, you'll take ownership of high-integrity mechanical designs that must perform flawlessly within one of the most demanding engineering environments in the world. You'll shape complex system solutions, influence platform-level decisions , and ensure designs meet the rigorous performance, safety, and environmental requirements unique to submarine engineering. This a chance to work at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK's most advanced defence programmes. We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 13th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal Mechanical Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of complex fluid systems, shaping designs that meet demanding performance and environmental requirements Create and review high-value engineering deliverables - for schematics and P&IDs to calculations, system descriptions, and 3D models Drive advanced system analyses , including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks), ensuring it meet tough submarine operating environments Champion technology integrity by reviewing supplier documentation, ensuring full compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints Influence design quality and safety, contributing to reviews, hazard studies, verification activities, and resolution of technical issues, modifications, and non-conformances Your skills and experiences: Essential: Educated to degree level, with Chartered Engineer status highly desirable Solid background in mechanical, marine, process, or fluid systems engineering gained with a complex or highly regulated environment Strong knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis , and system performance modelling Demonstrated technical expertise in the design, analysis , and integration of both compressible and incompressible fluid systems Desirable: Experience using industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Mechanical Engineering Discipline team: This is an exciting opportunity to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer, where you'll serve as a technical specialist for some of the submarine's most critical compressible and incompressible fluid systems. In this role, you'll take ownership of high-integrity mechanical designs that must perform flawlessly within one of the most demanding engineering environments in the world. You'll shape complex system solutions, influence platform-level decisions , and ensure designs meet the rigorous performance, safety, and environmental requirements unique to submarine engineering. This a chance to work at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK's most advanced defence programmes. We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 13th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal Mechanical Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of complex fluid systems, shaping designs that meet demanding performance and environmental requirements Create and review high-value engineering deliverables - for schematics and P&IDs to calculations, system descriptions, and 3D models Drive advanced system analyses , including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks), ensuring it meet tough submarine operating environments Champion technology integrity by reviewing supplier documentation, ensuring full compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints Influence design quality and safety, contributing to reviews, hazard studies, verification activities, and resolution of technical issues, modifications, and non-conformances Your skills and experiences: Essential: Educated to degree level, with Chartered Engineer status highly desirable Solid background in mechanical, marine, process, or fluid systems engineering gained with a complex or highly regulated environment Strong knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis , and system performance modelling Demonstrated technical expertise in the design, analysis , and integration of both compressible and incompressible fluid systems Desirable: Experience using industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Mechanical Engineering Discipline team: This is an exciting opportunity to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer, where you'll serve as a technical specialist for some of the submarine's most critical compressible and incompressible fluid systems. In this role, you'll take ownership of high-integrity mechanical designs that must perform flawlessly within one of the most demanding engineering environments in the world. You'll shape complex system solutions, influence platform-level decisions , and ensure designs meet the rigorous performance, safety, and environmental requirements unique to submarine engineering. This a chance to work at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK's most advanced defence programmes. We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 13th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal Mechanical Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of complex fluid systems, shaping designs that meet demanding performance and environmental requirements Create and review high-value engineering deliverables - for schematics and P&IDs to calculations, system descriptions, and 3D models Drive advanced system analyses , including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks), ensuring it meet tough submarine operating environments Champion technology integrity by reviewing supplier documentation, ensuring full compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints Influence design quality and safety, contributing to reviews, hazard studies, verification activities, and resolution of technical issues, modifications, and non-conformances Your skills and experiences: Essential: Educated to degree level, with Chartered Engineer status highly desirable Solid background in mechanical, marine, process, or fluid systems engineering gained with a complex or highly regulated environment Strong knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis , and system performance modelling Demonstrated technical expertise in the design, analysis , and integration of both compressible and incompressible fluid systems Desirable: Experience using industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Mechanical Engineering Discipline team: This is an exciting opportunity to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer, where you'll serve as a technical specialist for some of the submarine's most critical compressible and incompressible fluid systems. In this role, you'll take ownership of high-integrity mechanical designs that must perform flawlessly within one of the most demanding engineering environments in the world. You'll shape complex system solutions, influence platform-level decisions , and ensure designs meet the rigorous performance, safety, and environmental requirements unique to submarine engineering. This a chance to work at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK's most advanced defence programmes. We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 13th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal Mechanical Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of complex fluid systems, shaping designs that meet demanding performance and environmental requirements Create and review high-value engineering deliverables - for schematics and P&IDs to calculations, system descriptions, and 3D models Drive advanced system analyses , including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks), ensuring it meet tough submarine operating environments Champion technology integrity by reviewing supplier documentation, ensuring full compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints Influence design quality and safety, contributing to reviews, hazard studies, verification activities, and resolution of technical issues, modifications, and non-conformances Your skills and experiences: Essential: Educated to degree level, with Chartered Engineer status highly desirable Solid background in mechanical, marine, process, or fluid systems engineering gained with a complex or highly regulated environment Strong knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis , and system performance modelling Demonstrated technical expertise in the design, analysis , and integration of both compressible and incompressible fluid systems Desirable: Experience using industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Mechanical Engineering Discipline team: This is an exciting opportunity to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer, where you'll serve as a technical specialist for some of the submarine's most critical compressible and incompressible fluid systems. In this role, you'll take ownership of high-integrity mechanical designs that must perform flawlessly within one of the most demanding engineering environments in the world. You'll shape complex system solutions, influence platform-level decisions , and ensure designs meet the rigorous performance, safety, and environmental requirements unique to submarine engineering. This a chance to work at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK's most advanced defence programmes. We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 13th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal Mechanical Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of complex fluid systems, shaping designs that meet demanding performance and environmental requirements Create and review high-value engineering deliverables - for schematics and P&IDs to calculations, system descriptions, and 3D models Drive advanced system analyses , including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks), ensuring it meet tough submarine operating environments Champion technology integrity by reviewing supplier documentation, ensuring full compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints Influence design quality and safety, contributing to reviews, hazard studies, verification activities, and resolution of technical issues, modifications, and non-conformances Your skills and experiences: Essential: Educated to degree level, with Chartered Engineer status highly desirable Solid background in mechanical, marine, process, or fluid systems engineering gained with a complex or highly regulated environment Strong knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis , and system performance modelling Demonstrated technical expertise in the design, analysis , and integration of both compressible and incompressible fluid systems Desirable: Experience using industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Mechanical Engineering Discipline team: This is an exciting opportunity to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer, where you'll serve as a technical specialist for some of the submarine's most critical compressible and incompressible fluid systems. In this role, you'll take ownership of high-integrity mechanical designs that must perform flawlessly within one of the most demanding engineering environments in the world. You'll shape complex system solutions, influence platform-level decisions , and ensure designs meet the rigorous performance, safety, and environmental requirements unique to submarine engineering. This a chance to work at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK's most advanced defence programmes. We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 13th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal Mechanical Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of complex fluid systems, shaping designs that meet demanding performance and environmental requirements Create and review high-value engineering deliverables - for schematics and P&IDs to calculations, system descriptions, and 3D models Drive advanced system analyses , including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks), ensuring it meet tough submarine operating environments Champion technology integrity by reviewing supplier documentation, ensuring full compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints Influence design quality and safety, contributing to reviews, hazard studies, verification activities, and resolution of technical issues, modifications, and non-conformances Your skills and experiences: Essential: Educated to degree level, with Chartered Engineer status highly desirable Solid background in mechanical, marine, process, or fluid systems engineering gained with a complex or highly regulated environment Strong knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis , and system performance modelling Demonstrated technical expertise in the design, analysis , and integration of both compressible and incompressible fluid systems Desirable: Experience using industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Mechanical Engineering Discipline team: This is an exciting opportunity to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer, where you'll serve as a technical specialist for some of the submarine's most critical compressible and incompressible fluid systems. In this role, you'll take ownership of high-integrity mechanical designs that must perform flawlessly within one of the most demanding engineering environments in the world. You'll shape complex system solutions, influence platform-level decisions , and ensure designs meet the rigorous performance, safety, and environmental requirements unique to submarine engineering. This a chance to work at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK's most advanced defence programmes. We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 13th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal Mechanical Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of complex fluid systems, shaping designs that meet demanding performance and environmental requirements Create and review high-value engineering deliverables - for schematics and P&IDs to calculations, system descriptions, and 3D models Drive advanced system analyses , including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks), ensuring it meet tough submarine operating environments Champion technology integrity by reviewing supplier documentation, ensuring full compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints Influence design quality and safety, contributing to reviews, hazard studies, verification activities, and resolution of technical issues, modifications, and non-conformances Your skills and experiences: Essential: Educated to degree level, with Chartered Engineer status highly desirable Solid background in mechanical, marine, process, or fluid systems engineering gained with a complex or highly regulated environment Strong knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis , and system performance modelling Demonstrated technical expertise in the design, analysis , and integration of both compressible and incompressible fluid systems Desirable: Experience using industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Mechanical Engineering Discipline team: This is an exciting opportunity to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer, where you'll serve as a technical specialist for some of the submarine's most critical compressible and incompressible fluid systems. In this role, you'll take ownership of high-integrity mechanical designs that must perform flawlessly within one of the most demanding engineering environments in the world. You'll shape complex system solutions, influence platform-level decisions , and ensure designs meet the rigorous performance, safety, and environmental requirements unique to submarine engineering. This a chance to work at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK's most advanced defence programmes. We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 13th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Job Title: Principal HVAC Design Engineer Location: Barrow-in-Furness. We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this role Salary: Circa £55,000 What you'll be doing: Lead the end-to-end development of cutting-edge HVAC systems, ensuring they meet demanding performance, safety, and environmental standards Create and review high-impact engineering artefacts - from specifications and P&IDs to calculations and 3D models Drive advanced thermal, airflow, and pressure analyses toto validate system performance in challenging conditions Transform complex requirements into robust, innovative, and verifiable design solutions that set the benchmark for excellence Guide and influence engineers, suppliers, and design partners, shaping best-in-class HVAC integration across the platform Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification Your skills and experiences: Essential Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics and system balancing Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation Excellent technical communication and reporting abilities, engaging both internal and external stakeholders STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred) Desirable Proven experience working in complex or regulated industries, with knowledge of standards such as ISO 15138, BS EN 378, ASHRAE, or CIBSE Skilled in system performance assessment, design validation, modelling, and failure analysis Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts - you may also be eligible for an annual incentive. The Platform Mechanical Integrated Delivery Team: As a Principal HVAC Design Engineer, you'll be at the forefront of one of the UK's most advanced engineering programmes - leading the delivery of complex HVAC systems that shape the future of submarine platforms. You'll take ownership of high-impact systems, provide trusted technical authority, and work across multiple disciplines to drive innovative solutions into reality. You'll be part of the Platform Mechanical Integrated Delivery Team - a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds and partner organisations, contributing to mechanical capabilities that are critical to the success of the entire platform We offer relocation support across all Submarine roles, subject to meeting eligibility criteria Why BAE Systems? This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc .) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role , to allow for meaningful security vetting checks. Closing Date: 12th February 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role . Therefore, if you are interested, please submit your application as early as possible.

Our client, an Aerospace and Defence Supplier is looking for a Stress Engineer to join them on a contract basis at their site in Basildon. Due to the nature of the role, applicants must hold the British nationality and be willing to obtain SC Clearance. 4 days per week onsite. Although Basildon is the preferred location, can consider individuals to be based out of Southampton or Bristol. 7 month contract 55.05 p/h Umbrella, inside IR35. What you'll do as a Principal Stress Engineer: Analyse and assess mechanical designs for strength, durability, performance and safety against regulatory and customer requirements using finite element techniques and classical hand calculations. Generate Finite Element Models and reports as per requirements. Support the selection of manufacturing technologies and materials based on a sound understanding of material physical and mechanical properties and the mechanical fit, form and function of the product. Conduct structural and thermo-structural analyses of complex Products using Siemens NX. Advise/support on the development of mechanical structural designs to achieve the desired Product Requirements. Ensure compliance with all relevant legislative, regulatory and contractual requirements (based on recognised military/civil standards). Point of contact for assigned projects, advising on all aspects of stress and structural dynamics throughout the product lifecycle. Technical Skills: Must Have Application of a wide range of classical hand calculation techniques for static and dynamic loading conditions and fatigue assessment (Land, Naval or Airborne equipment). Experience of environmental test methods for design verification and working knowledge of design certification for land based and airborne equipment. Proven experience in the use of Finite Element Analysis software tools (preferably Siemens NX/Nastran) and techniques. Nice To Have An understanding of the Pressure Equipment Directive 2014/68/EU. Experience in the design, analysis and test of electronics packaging and/or aerospace equipment. Experience in Thermal Analysis techniques and tool sets (IcePak, Siemens NX). Experience of manufacturing and joining techniques, engineering material properties.