10 jobs found

Job Title: Principal Mechanical Engineer Location: Barrow-in-Furness, Hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on skills and experience Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there's no limit to where a career at BAE Systems could take you. What you will be doing: In this role, you will lead the design and development of mechanical systems for next-generation Royal Navy submarines, with a focus on air purification and atmosphere monitoring systems. You will undertake system-level design, modelling and analysis , and produce design documentation, verification and validation evidence, and safety justifications. Working collaboratively with suppliers and cross-functional teams, you will support specification, qualification, and procurement activities. You will also play a key role in driving engineering governance through design reviews and peer reviews, while providing technical leadership across the project lifecycle. Core duties: You will design platform systems, sub-systems, and equipment, ensuring alignment with programme requirements and engineering standards You will undertake functional design activities, including modelling, analysis , and system performance evaluation You will produce and maintain design documentation, verification and validation evidence, and safety justifications You will support supplier engagement, including specification, qualification, and procurement of components You will collaborate with stakeholders across multidisciplinary project teams to ensure successful delivery You will drive engineering governance through design reviews, peer reviews, and technical oversight Essential skills Degree-level qualification, Chartered Engineer status, or working towards professional accreditation Mechanical engineering background in rotating machinery, components, or fluid dynamics Knowledge of platform-level constraints such as noise, shock, or survivability Experience integrating purification systems with submarine life-support, HVAC, and emergency systems Experience in the design of gas scrubbing, filtration, and environmental control systems (e.g. CO removal, O generation, contaminant management ) within complex , safety-critical environments The Mechanical Engineering team: The Mechanical Engineering team plays a key role in the design and development of submarine systems, delivering innovative solutions across complex and safety-critical environments. As a Principal Mechanical Engineer, you will contribute to system-level design, provide technical leadership , and support the development of advanced air purification and atmosphere monitoring systems, helping to shape the future of submarine capability. A place where everyone can thrive: We're committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. 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. Why BAE Systems? Here you'll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You'll be recognised for your contribution and enjoy rewards tailored to what's most important to you and your family, supporting your financial and personal wellbeing as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and be proud of the difference you make. Closing Date: 15th April 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 Engineer Location: Barrow-in-Furness, Hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on skills and experience Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there's no limit to where a career at BAE Systems could take you. What you will be doing: In this role, you will lead the design and development of mechanical systems for next-generation Royal Navy submarines, with a focus on air purification and atmosphere monitoring systems. You will undertake system-level design, modelling and analysis , and produce design documentation, verification and validation evidence, and safety justifications. Working collaboratively with suppliers and cross-functional teams, you will support specification, qualification, and procurement activities. You will also play a key role in driving engineering governance through design reviews and peer reviews, while providing technical leadership across the project lifecycle. Core duties: You will design platform systems, sub-systems, and equipment, ensuring alignment with programme requirements and engineering standards You will undertake functional design activities, including modelling, analysis , and system performance evaluation You will produce and maintain design documentation, verification and validation evidence, and safety justifications You will support supplier engagement, including specification, qualification, and procurement of components You will collaborate with stakeholders across multidisciplinary project teams to ensure successful delivery You will drive engineering governance through design reviews, peer reviews, and technical oversight Essential skills Degree-level qualification, Chartered Engineer status, or working towards professional accreditation Mechanical engineering background in rotating machinery, components, or fluid dynamics Knowledge of platform-level constraints such as noise, shock, or survivability Experience integrating purification systems with submarine life-support, HVAC, and emergency systems Experience in the design of gas scrubbing, filtration, and environmental control systems (e.g. CO removal, O generation, contaminant management ) within complex , safety-critical environments The Mechanical Engineering team: The Mechanical Engineering team plays a key role in the design and development of submarine systems, delivering innovative solutions across complex and safety-critical environments. As a Principal Mechanical Engineer, you will contribute to system-level design, provide technical leadership , and support the development of advanced air purification and atmosphere monitoring systems, helping to shape the future of submarine capability. A place where everyone can thrive: We're committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. 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. Why BAE Systems? Here you'll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You'll be recognised for your contribution and enjoy rewards tailored to what's most important to you and your family, supporting your financial and personal wellbeing as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and be proud of the difference you make. Closing Date: 15th April 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 Engineer Location: Barrow-in-Furness, Hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on skills and experience Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there's no limit to where a career at BAE Systems could take you. What you will be doing: In this role, you will lead the design and development of mechanical systems for next-generation Royal Navy submarines, with a focus on air purification and atmosphere monitoring systems. You will undertake system-level design, modelling and analysis , and produce design documentation, verification and validation evidence, and safety justifications. Working collaboratively with suppliers and cross-functional teams, you will support specification, qualification, and procurement activities. You will also play a key role in driving engineering governance through design reviews and peer reviews, while providing technical leadership across the project lifecycle. Core duties: You will design platform systems, sub-systems, and equipment, ensuring alignment with programme requirements and engineering standards You will undertake functional design activities, including modelling, analysis , and system performance evaluation You will produce and maintain design documentation, verification and validation evidence, and safety justifications You will support supplier engagement, including specification, qualification, and procurement of components You will collaborate with stakeholders across multidisciplinary project teams to ensure successful delivery You will drive engineering governance through design reviews, peer reviews, and technical oversight Essential skills Degree-level qualification, Chartered Engineer status, or working towards professional accreditation Mechanical engineering background in rotating machinery, components, or fluid dynamics Knowledge of platform-level constraints such as noise, shock, or survivability Experience integrating purification systems with submarine life-support, HVAC, and emergency systems Experience in the design of gas scrubbing, filtration, and environmental control systems (e.g. CO removal, O generation, contaminant management ) within complex , safety-critical environments The Mechanical Engineering team: The Mechanical Engineering team plays a key role in the design and development of submarine systems, delivering innovative solutions across complex and safety-critical environments. As a Principal Mechanical Engineer, you will contribute to system-level design, provide technical leadership , and support the development of advanced air purification and atmosphere monitoring systems, helping to shape the future of submarine capability. A place where everyone can thrive: We're committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. 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. Why BAE Systems? Here you'll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You'll be recognised for your contribution and enjoy rewards tailored to what's most important to you and your family, supporting your financial and personal wellbeing as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and be proud of the difference you make. Closing Date: 15th April 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 Engineer Location: Barrow-in-Furness, Hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on skills and experience Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there's no limit to where a career at BAE Systems could take you. What you will be doing: In this role, you will lead the design and development of mechanical systems for next-generation Royal Navy submarines, with a focus on air purification and atmosphere monitoring systems. You will undertake system-level design, modelling and analysis , and produce design documentation, verification and validation evidence, and safety justifications. Working collaboratively with suppliers and cross-functional teams, you will support specification, qualification, and procurement activities. You will also play a key role in driving engineering governance through design reviews and peer reviews, while providing technical leadership across the project lifecycle. Core duties: You will design platform systems, sub-systems, and equipment, ensuring alignment with programme requirements and engineering standards You will undertake functional design activities, including modelling, analysis , and system performance evaluation You will produce and maintain design documentation, verification and validation evidence, and safety justifications You will support supplier engagement, including specification, qualification, and procurement of components You will collaborate with stakeholders across multidisciplinary project teams to ensure successful delivery You will drive engineering governance through design reviews, peer reviews, and technical oversight Essential skills Degree-level qualification, Chartered Engineer status, or working towards professional accreditation Mechanical engineering background in rotating machinery, components, or fluid dynamics Knowledge of platform-level constraints such as noise, shock, or survivability Experience integrating purification systems with submarine life-support, HVAC, and emergency systems Experience in the design of gas scrubbing, filtration, and environmental control systems (e.g. CO removal, O generation, contaminant management ) within complex , safety-critical environments The Mechanical Engineering team: The Mechanical Engineering team plays a key role in the design and development of submarine systems, delivering innovative solutions across complex and safety-critical environments. As a Principal Mechanical Engineer, you will contribute to system-level design, provide technical leadership , and support the development of advanced air purification and atmosphere monitoring systems, helping to shape the future of submarine capability. A place where everyone can thrive: We're committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. 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. Why BAE Systems? Here you'll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You'll be recognised for your contribution and enjoy rewards tailored to what's most important to you and your family, supporting your financial and personal wellbeing as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and be proud of the difference you make. Closing Date: 15th April 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 Engineer Location: Barrow-in-Furness, Hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on skills and experience Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there's no limit to where a career at BAE Systems could take you. What you will be doing: In this role, you will lead the design and development of mechanical systems for next-generation Royal Navy submarines, with a focus on air purification and atmosphere monitoring systems. You will undertake system-level design, modelling and analysis , and produce design documentation, verification and validation evidence, and safety justifications. Working collaboratively with suppliers and cross-functional teams, you will support specification, qualification, and procurement activities. You will also play a key role in driving engineering governance through design reviews and peer reviews, while providing technical leadership across the project lifecycle. Core duties: You will design platform systems, sub-systems, and equipment, ensuring alignment with programme requirements and engineering standards You will undertake functional design activities, including modelling, analysis , and system performance evaluation You will produce and maintain design documentation, verification and validation evidence, and safety justifications You will support supplier engagement, including specification, qualification, and procurement of components You will collaborate with stakeholders across multidisciplinary project teams to ensure successful delivery You will drive engineering governance through design reviews, peer reviews, and technical oversight Essential skills Degree-level qualification, Chartered Engineer status, or working towards professional accreditation Mechanical engineering background in rotating machinery, components, or fluid dynamics Knowledge of platform-level constraints such as noise, shock, or survivability Experience integrating purification systems with submarine life-support, HVAC, and emergency systems Experience in the design of gas scrubbing, filtration, and environmental control systems (e.g. CO removal, O generation, contaminant management ) within complex , safety-critical environments The Mechanical Engineering team: The Mechanical Engineering team plays a key role in the design and development of submarine systems, delivering innovative solutions across complex and safety-critical environments. As a Principal Mechanical Engineer, you will contribute to system-level design, provide technical leadership , and support the development of advanced air purification and atmosphere monitoring systems, helping to shape the future of submarine capability. A place where everyone can thrive: We're committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. 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. Why BAE Systems? Here you'll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You'll be recognised for your contribution and enjoy rewards tailored to what's most important to you and your family, supporting your financial and personal wellbeing as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and be proud of the difference you make. Closing Date: 15th April 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 Engineer Location: Barrow-in-Furness, Hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on skills and experience Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there's no limit to where a career at BAE Systems could take you. What you will be doing: In this role, you will lead the design and development of mechanical systems for next-generation Royal Navy submarines, with a focus on air purification and atmosphere monitoring systems. You will undertake system-level design, modelling and analysis , and produce design documentation, verification and validation evidence, and safety justifications. Working collaboratively with suppliers and cross-functional teams, you will support specification, qualification, and procurement activities. You will also play a key role in driving engineering governance through design reviews and peer reviews, while providing technical leadership across the project lifecycle. Core duties: You will design platform systems, sub-systems, and equipment, ensuring alignment with programme requirements and engineering standards You will undertake functional design activities, including modelling, analysis , and system performance evaluation You will produce and maintain design documentation, verification and validation evidence, and safety justifications You will support supplier engagement, including specification, qualification, and procurement of components You will collaborate with stakeholders across multidisciplinary project teams to ensure successful delivery You will drive engineering governance through design reviews, peer reviews, and technical oversight Essential skills Degree-level qualification, Chartered Engineer status, or working towards professional accreditation Mechanical engineering background in rotating machinery, components, or fluid dynamics Knowledge of platform-level constraints such as noise, shock, or survivability Experience integrating purification systems with submarine life-support, HVAC, and emergency systems Experience in the design of gas scrubbing, filtration, and environmental control systems (e.g. CO removal, O generation, contaminant management ) within complex , safety-critical environments The Mechanical Engineering team: The Mechanical Engineering team plays a key role in the design and development of submarine systems, delivering innovative solutions across complex and safety-critical environments. As a Principal Mechanical Engineer, you will contribute to system-level design, provide technical leadership , and support the development of advanced air purification and atmosphere monitoring systems, helping to shape the future of submarine capability. A place where everyone can thrive: We're committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. 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. Why BAE Systems? Here you'll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You'll be recognised for your contribution and enjoy rewards tailored to what's most important to you and your family, supporting your financial and personal wellbeing as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and be proud of the difference you make. Closing Date: 15th April 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 Engineer Location: Barrow-in-Furness, Hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on skills and experience Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there's no limit to where a career at BAE Systems could take you. What you will be doing: In this role, you will lead the design and development of mechanical systems for next-generation Royal Navy submarines, with a focus on air purification and atmosphere monitoring systems. You will undertake system-level design, modelling and analysis , and produce design documentation, verification and validation evidence, and safety justifications. Working collaboratively with suppliers and cross-functional teams, you will support specification, qualification, and procurement activities. You will also play a key role in driving engineering governance through design reviews and peer reviews, while providing technical leadership across the project lifecycle. Core duties: You will design platform systems, sub-systems, and equipment, ensuring alignment with programme requirements and engineering standards You will undertake functional design activities, including modelling, analysis , and system performance evaluation You will produce and maintain design documentation, verification and validation evidence, and safety justifications You will support supplier engagement, including specification, qualification, and procurement of components You will collaborate with stakeholders across multidisciplinary project teams to ensure successful delivery You will drive engineering governance through design reviews, peer reviews, and technical oversight Essential skills Degree-level qualification, Chartered Engineer status, or working towards professional accreditation Mechanical engineering background in rotating machinery, components, or fluid dynamics Knowledge of platform-level constraints such as noise, shock, or survivability Experience integrating purification systems with submarine life-support, HVAC, and emergency systems Experience in the design of gas scrubbing, filtration, and environmental control systems (e.g. CO removal, O generation, contaminant management ) within complex , safety-critical environments The Mechanical Engineering team: The Mechanical Engineering team plays a key role in the design and development of submarine systems, delivering innovative solutions across complex and safety-critical environments. As a Principal Mechanical Engineer, you will contribute to system-level design, provide technical leadership , and support the development of advanced air purification and atmosphere monitoring systems, helping to shape the future of submarine capability. A place where everyone can thrive: We're committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. 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. Why BAE Systems? Here you'll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You'll be recognised for your contribution and enjoy rewards tailored to what's most important to you and your family, supporting your financial and personal wellbeing as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and be proud of the difference you make. Closing Date: 15th April 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 Engineer Location: Barrow-in-Furness, Hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on skills and experience Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there's no limit to where a career at BAE Systems could take you. What you will be doing: In this role, you will lead the design and development of mechanical systems for next-generation Royal Navy submarines, with a focus on air purification and atmosphere monitoring systems. You will undertake system-level design, modelling and analysis , and produce design documentation, verification and validation evidence, and safety justifications. Working collaboratively with suppliers and cross-functional teams, you will support specification, qualification, and procurement activities. You will also play a key role in driving engineering governance through design reviews and peer reviews, while providing technical leadership across the project lifecycle. Core duties: You will design platform systems, sub-systems, and equipment, ensuring alignment with programme requirements and engineering standards You will undertake functional design activities, including modelling, analysis , and system performance evaluation You will produce and maintain design documentation, verification and validation evidence, and safety justifications You will support supplier engagement, including specification, qualification, and procurement of components You will collaborate with stakeholders across multidisciplinary project teams to ensure successful delivery You will drive engineering governance through design reviews, peer reviews, and technical oversight Essential skills Degree-level qualification, Chartered Engineer status, or working towards professional accreditation Mechanical engineering background in rotating machinery, components, or fluid dynamics Knowledge of platform-level constraints such as noise, shock, or survivability Experience integrating purification systems with submarine life-support, HVAC, and emergency systems Experience in the design of gas scrubbing, filtration, and environmental control systems (e.g. CO removal, O generation, contaminant management ) within complex , safety-critical environments The Mechanical Engineering team: The Mechanical Engineering team plays a key role in the design and development of submarine systems, delivering innovative solutions across complex and safety-critical environments. As a Principal Mechanical Engineer, you will contribute to system-level design, provide technical leadership , and support the development of advanced air purification and atmosphere monitoring systems, helping to shape the future of submarine capability. A place where everyone can thrive: We're committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. 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. Why BAE Systems? Here you'll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You'll be recognised for your contribution and enjoy rewards tailored to what's most important to you and your family, supporting your financial and personal wellbeing as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and be proud of the difference you make. Closing Date: 15th April 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.

Principal Mechanical Design Engineer - Building Services (Critical Systems) Location: Chester (Hybrid Working) Salary: 60,000 - 70,000 per annum Job Type: Permanent An excellent opportunity has arisen for an experienced Principal Mechanical Design Engineer to join a leading building services consultancy working within a specialist critical systems team . This role offers the chance to lead the delivery of technically complex mechanical building services projects , with a strong focus on Stage 4 detailed design and high-performance engineering solutions. The successful Principal Mechanical Design Engineer will play a key role in technical leadership, project delivery and team coordination , contributing to innovative and high-quality building services designs across critical environments. Key Responsibilities As a Principal Mechanical Design Engineer , your responsibilities will include: Leading the delivery of mechanical building services design projects Producing and reviewing Stage 4 detailed design documentation Developing HVAC system designs, calculations and technical specifications Providing technical leadership across project teams and design delivery Collaborating with electrical engineers, structural engineers and architects Supporting BIM coordination and multidisciplinary design integration Ensuring designs meet industry standards, regulations and client requirements Managing project delivery in line with programme, budget and quality targets Mentoring and supporting junior and intermediate engineers Requirements To be considered for this Principal Mechanical Design Engineer role, candidates should have: Proven experience working as a Senior or Principal Mechanical Design Engineer within building services Strong knowledge of HVAC systems and mechanical design principles Experience delivering projects across RIBA Stage 4 detailed design Experience working within consultancy or multidisciplinary engineering environments Strong leadership, communication and coordination skills Ability to manage technical delivery and project teams Desirable: Experience working on critical systems or mission-critical environments Progression towards or achievement of Chartered Engineer (CEng) status Experience using Revit or BIM software What's On Offer 60,000 - 70,000 salary Hybrid working in Chester Opportunity to work within a specialist critical systems team Exposure to complex and high-performance building services projects Strong opportunities for career progression and leadership development If you are a Principal Mechanical Design Engineer with strong building services experience looking to work on critical systems and Stage 4 projects, this is an excellent opportunity to join a forward-thinking engineering consultancy. Apply now to learn more about this opportunity.

Role: Principal Mechanical Engineer Location: Plymouth(Hybrid) Duration: 12 months Inside IR35: Umbrella About our client: Our client is a leading global aerospace, Defense, and security company specializing in delivering complex, mission-critical solutions. With a strong heritage in engineering and innovation, they provide essential services across aviation, marine, land, and nuclear sectors, supporting governments, armed forces, and commercial clients worldwide. Renowned for their commitment to safety, sustainability, and technological advancement, our client plays a vital role in ensuring operational excellence for their customers. Join them and be part of a team that drives innovation and delivers cutting-edge solutions in some of the world's most demanding environments. The primary purpose of the Senior Mechanical Building Services Engineer role is to lead Mechanical Building Services projects delivered by subcontractors. This role ensures that outsourced designs meet technical, regulatory, and business requirements while maintaining the highest standards of quality and compliance. The successful candidate will act as the technical authority, bridging the gap between the company's engineering requirements and subcontractor performance. The key responsibilities of the role include : Prescribe the Mechanical Building Services requirements for design projects. Specify Mechanical Building Services aspects in Scope of Work Documentation. Produce estimates and assist commercial departments in the production of outgoing tender responses. Support tender reviews from a technical perspective. Represent our client at meetings with stakeholders and contractors. Provide technical oversight of Mechanical Building Services designs through frequent reviews and progress meetings. Support Design Reviews to ensure that subcontractor designs align with company requirements, industry standards, and regulatory compliance. Design Validation. Conduct independent assessments, technical audits, and feasibility reviews to verify design integrity and functionality. Lead author of design documentation Responding to subcontractor Technical Queries. Represent the Mechanical Services Technical Authority by leading on-site visits and where appropriate, providing guidance and leadership to staff. Conduct site surveys, inspections, and monitor site works. Lead the provision of advice to line management and other key stakeholders, on the implementation and maintenance of design documentation and compliance with relevant codes, standards and legislation. Provide technical oversight to junior engineers. Maintaining complete records and archives to company standards. Required: Excellent understanding of mechanical engineering principles for the design, operation and maintenance of Steam & Condensate, Industrial Gases, Fresh Water, Demineralised Water, HVAC, Domestic Water services etc. Knowledge and experience of BREEAM, DREAM, Building Regs Experience of working in a design consultancy and/or experience of working within a contractor design environment. Knowledge / experience in managing a small team of engineers. Good level of computer literacy in a range of digital tools. Knowledge of the design lifecycle Detailed knowledge of appropriate, regulations, legislation and technical standards that are applicable to mechanical services system design. Knowledge of operating within nuclear or other high-hazard Industries. Familiar with energy reduction methods and approaches to decarbonising new and existing buildings. Including principles of building physics such as passive design solutions. Experience of commissioning and post installation evaluation of performance. Please apply if you want to be part of a leading global defence, and security company that delivers complex, mission-critical solutions