We are seeking an experienced SC Cleared Lead Security Architect to join a high-profile Defence and National Security programme focused on secure AI/ML adoption, multi-cloud platforms, DevSecOps, and edge computing environments. This is a strategic leadership role where you will own security architecture, assurance, and governance across complex cloud and AI-enabled solutions, supporting secure collaboration across multiple stakeholders and international partners. Key Responsibilities Lead security architecture across AI/ML, cloud, edge, and DevSecOps environments. Define secure-by-design principles and drive assurance activities end-to-end. Conduct threat modelling, risk assessments, and security architecture reviews. Define security controls, trust boundaries, and cross-domain data movement guardrails. Establish DevSecOps security roadmaps, policy-as-code controls, and risk-based CI/CD security gates. Drive software supply chain security, including artefact signing, SBOMs, provenance, and secure promotion processes. Chair security working groups and engage with senior stakeholders across technical and business functions. Mentor and support junior security professionals. Essential Skills & Experience 5+ years' experience in Security Architecture or Cyber Security leadership roles. Strong experience designing secure multi-cloud and edge architectures. Deep understanding of DevSecOps, CI/CD security, threat modelling, and risk management. Experience implementing secure software supply chain controls and secure development practices. Proven stakeholder management and leadership experience. Desirable Defence, National Security, Government, Aerospace, or Secure Public Sector experience. Experience supporting AI/ML platforms and emerging technologies. Knowledge of UK Defence security frameworks and assurance processes. CISSP (or equivalent) and TOGAF certifications.
Jun 30, 2026
Contractor
We are seeking an experienced SC Cleared Lead Security Architect to join a high-profile Defence and National Security programme focused on secure AI/ML adoption, multi-cloud platforms, DevSecOps, and edge computing environments. This is a strategic leadership role where you will own security architecture, assurance, and governance across complex cloud and AI-enabled solutions, supporting secure collaboration across multiple stakeholders and international partners. Key Responsibilities Lead security architecture across AI/ML, cloud, edge, and DevSecOps environments. Define secure-by-design principles and drive assurance activities end-to-end. Conduct threat modelling, risk assessments, and security architecture reviews. Define security controls, trust boundaries, and cross-domain data movement guardrails. Establish DevSecOps security roadmaps, policy-as-code controls, and risk-based CI/CD security gates. Drive software supply chain security, including artefact signing, SBOMs, provenance, and secure promotion processes. Chair security working groups and engage with senior stakeholders across technical and business functions. Mentor and support junior security professionals. Essential Skills & Experience 5+ years' experience in Security Architecture or Cyber Security leadership roles. Strong experience designing secure multi-cloud and edge architectures. Deep understanding of DevSecOps, CI/CD security, threat modelling, and risk management. Experience implementing secure software supply chain controls and secure development practices. Proven stakeholder management and leadership experience. Desirable Defence, National Security, Government, Aerospace, or Secure Public Sector experience. Experience supporting AI/ML platforms and emerging technologies. Knowledge of UK Defence security frameworks and assurance processes. CISSP (or equivalent) and TOGAF certifications.
Lead Security Architect (Defence DevSecOps and AI/ML) Location: Portsmouth | Hybrid 50% and 50% Duration: 23/11/2026 MUST BE PAYE THROUGH UMBRELLA Title: Lead Security Architect (Defence DevSecOps and AI/ML) Mission: Own security architecture and the integration roadmap for AI/ML across multi-cloud and edge; align to client IT/cloud strategy and UK Defence priorities; enable secure multinational collaboration and high-side code promotions with repeatable assurance. Manage the Secure by Design elements of the project and own the assurance process end to end. Key Responsibilities Lead the Security elements of the program across different use cases for AI/ML development and trials. Chair Security Working groups and tri-nation collaboration. Manage security visibility and outcomes, manage senior stakeholder engagement. Threat and risk management; translate ambiguous requirements into testable controls. Define classification-aware architectures, trust boundaries, cross-domain data movement guardrails. Provide Security guidance and controls for complex program. Lead Security roadmap: DevSecOps, policy-as-code controls, risk-based CI/CD gates. Govern supply-chain security: artefact signing, SBOMs, provenance; adopt SLSA-style controls. Reduced lead time to secure release; zero-critical promotion checkpoints; supplier onboarding efficiency; executive risk communication. Mentor juniors Experience & Qualifications 5+ years in Cyber Security, proven multi-cloud/edge architecture. Defence experience; familiarity with UK guidance; at least MOD SC cleared and UK Sole national. Certifications: CISSP(equivalent), TOGAF
Jun 30, 2026
Contractor
Lead Security Architect (Defence DevSecOps and AI/ML) Location: Portsmouth | Hybrid 50% and 50% Duration: 23/11/2026 MUST BE PAYE THROUGH UMBRELLA Title: Lead Security Architect (Defence DevSecOps and AI/ML) Mission: Own security architecture and the integration roadmap for AI/ML across multi-cloud and edge; align to client IT/cloud strategy and UK Defence priorities; enable secure multinational collaboration and high-side code promotions with repeatable assurance. Manage the Secure by Design elements of the project and own the assurance process end to end. Key Responsibilities Lead the Security elements of the program across different use cases for AI/ML development and trials. Chair Security Working groups and tri-nation collaboration. Manage security visibility and outcomes, manage senior stakeholder engagement. Threat and risk management; translate ambiguous requirements into testable controls. Define classification-aware architectures, trust boundaries, cross-domain data movement guardrails. Provide Security guidance and controls for complex program. Lead Security roadmap: DevSecOps, policy-as-code controls, risk-based CI/CD gates. Govern supply-chain security: artefact signing, SBOMs, provenance; adopt SLSA-style controls. Reduced lead time to secure release; zero-critical promotion checkpoints; supplier onboarding efficiency; executive risk communication. Mentor juniors Experience & Qualifications 5+ years in Cyber Security, proven multi-cloud/edge architecture. Defence experience; familiarity with UK guidance; at least MOD SC cleared and UK Sole national. Certifications: CISSP(equivalent), TOGAF
CBSbutler Holdings Limited trading as CBSbutler
Portsmouth, Hampshire
Platform Engineer - DevOps Specialist Rate: 558 per day (Inside IR35) Location: Portsmouth (Hybrid - 2 days every other week on site, remainder remote) Contract: 6 months+ Clearance: Active SC Security Clearance required Overview We are seeking a Platform Engineer / DevOps Specialist to join a highly secure and complex engineering environment, supporting the modernisation and maturity uplift of critical platforms operating across both AWS and Azure. This role sits at the intersection of hands-on DevOps engineering and technical leadership (approx. 60/40 split) - where you will guide direction, lead on platform evolution, and still actively contribute to delivery. Key Responsibilities Design, build and maintain CI/CD pipelines in a DevSecOps environment Drive automation across infrastructure, deployment, and platform operations Work hands-on with Kubernetes, Docker, and containerised workloads Support and evolve platforms across AWS and Azure environments Implement secure development practices, including security scanning and compliance controls Contribute to platform modernisation and maturity uplift across two environments at different stages Operate within air-gapped and restricted access environments (including ITAR and special access considerations) Integrate and support AI/ML models within platform architecture (core requirement) Provide technical leadership while remaining hands-on with delivery Essential Skills & Experience Strong experience in DevOps / Platform Engineering roles within enterprise or secure environments Proven expertise in: CI/CD pipeline development and automation Kubernetes and Docker Bash / Linux / Python scripting Infrastructure automation and containerisation Experience working within DevSecOps practices including security scanning and compliance tooling Experience with AWS and/or Azure cloud platforms Strong understanding of DevOps culture and modern engineering practices Experience supporting platform modernisation or legacy-to-modern migrations Desirable Experience Apache Kafka AI/ML model integration within platform environments Exposure to ITAR / defence / highly regulated systems Experience operating in environments with multiple maturity levels across platforms Role Focus This is a hybrid engineering/leadership position (SFIA level 6) where you will: Lead technical direction and platform evolution Support and guide engineering teams Remain actively involved in hands-on engineering delivery
Jun 29, 2026
Contractor
Platform Engineer - DevOps Specialist Rate: 558 per day (Inside IR35) Location: Portsmouth (Hybrid - 2 days every other week on site, remainder remote) Contract: 6 months+ Clearance: Active SC Security Clearance required Overview We are seeking a Platform Engineer / DevOps Specialist to join a highly secure and complex engineering environment, supporting the modernisation and maturity uplift of critical platforms operating across both AWS and Azure. This role sits at the intersection of hands-on DevOps engineering and technical leadership (approx. 60/40 split) - where you will guide direction, lead on platform evolution, and still actively contribute to delivery. Key Responsibilities Design, build and maintain CI/CD pipelines in a DevSecOps environment Drive automation across infrastructure, deployment, and platform operations Work hands-on with Kubernetes, Docker, and containerised workloads Support and evolve platforms across AWS and Azure environments Implement secure development practices, including security scanning and compliance controls Contribute to platform modernisation and maturity uplift across two environments at different stages Operate within air-gapped and restricted access environments (including ITAR and special access considerations) Integrate and support AI/ML models within platform architecture (core requirement) Provide technical leadership while remaining hands-on with delivery Essential Skills & Experience Strong experience in DevOps / Platform Engineering roles within enterprise or secure environments Proven expertise in: CI/CD pipeline development and automation Kubernetes and Docker Bash / Linux / Python scripting Infrastructure automation and containerisation Experience working within DevSecOps practices including security scanning and compliance tooling Experience with AWS and/or Azure cloud platforms Strong understanding of DevOps culture and modern engineering practices Experience supporting platform modernisation or legacy-to-modern migrations Desirable Experience Apache Kafka AI/ML model integration within platform environments Exposure to ITAR / defence / highly regulated systems Experience operating in environments with multiple maturity levels across platforms Role Focus This is a hybrid engineering/leadership position (SFIA level 6) where you will: Lead technical direction and platform evolution Support and guide engineering teams Remain actively involved in hands-on engineering delivery
CBSbutler Holdings Limited trading as CBSbutler
Portsmouth, Hampshire
Security Architect (Defence DevSecOps & AI/ML) Portsmouth/ Hybrid (3 days onsite) 645 per day Inside IR35 5-Month Contract Active SC or DV Clearance Required Are you an experienced Security Architect looking to shape the future of secure AI and cloud technologies within the UK Defence sector? We are looking for a Security Architect to join a high-profile defence programme, leading the design and assurance of secure AI/ML solutions across multi-cloud and edge environments. This is an opportunity to play a key role in delivering innovative capabilities while ensuring security is embedded throughout the programme lifecycle. You'll work alongside senior technical leaders, architects and engineering teams to define security strategy, influence governance and enable secure DevSecOps practices across a complex, mission-critical environment. What You'll Be Doing Leading the security architecture across AI/ML development and trial programmes. Driving the Secure by Design approach throughout project delivery. Owning the end-to-end security assurance process. Designing secure multi-cloud and edge architectures aligned with Defence requirements. Defining trust boundaries, classification-aware architectures and secure cross-domain data controls. Developing the security roadmap covering DevSecOps, policy-as-code and secure CI/CD pipelines. Leading software supply chain security, including SBOMs, artefact signing and software provenance. Conducting threat modelling and security risk assessments. Chairing security working groups and collaborating with multinational stakeholders. Engaging with senior leadership to communicate security risks, assurance activities and programme outcomes. Mentoring junior security professionals and promoting security best practice across delivery teams. What We're Looking For Proven experience as a Security Architect within complex enterprise or Defence environments. Strong background in cloud security architecture across multi-cloud and edge platforms. Experience implementing Secure by Design principles and DevSecOps practices. Expertise in: Threat modelling and risk management Policy-as-Code CI/CD security controls Software Supply Chain Security SBOMs, artefact signing and software provenance Excellent stakeholder management and communication skills. Previous experience working within UK Defence or other highly regulated environments. Experience leading technical security governance forums. Essential Requirements Active SC or DV Clearance. Sole UK National. CISSP (or equivalent security certification). TOGAF (or equivalent architecture certification). Previous experience supporting Defence programmes.
Jun 29, 2026
Contractor
Security Architect (Defence DevSecOps & AI/ML) Portsmouth/ Hybrid (3 days onsite) 645 per day Inside IR35 5-Month Contract Active SC or DV Clearance Required Are you an experienced Security Architect looking to shape the future of secure AI and cloud technologies within the UK Defence sector? We are looking for a Security Architect to join a high-profile defence programme, leading the design and assurance of secure AI/ML solutions across multi-cloud and edge environments. This is an opportunity to play a key role in delivering innovative capabilities while ensuring security is embedded throughout the programme lifecycle. You'll work alongside senior technical leaders, architects and engineering teams to define security strategy, influence governance and enable secure DevSecOps practices across a complex, mission-critical environment. What You'll Be Doing Leading the security architecture across AI/ML development and trial programmes. Driving the Secure by Design approach throughout project delivery. Owning the end-to-end security assurance process. Designing secure multi-cloud and edge architectures aligned with Defence requirements. Defining trust boundaries, classification-aware architectures and secure cross-domain data controls. Developing the security roadmap covering DevSecOps, policy-as-code and secure CI/CD pipelines. Leading software supply chain security, including SBOMs, artefact signing and software provenance. Conducting threat modelling and security risk assessments. Chairing security working groups and collaborating with multinational stakeholders. Engaging with senior leadership to communicate security risks, assurance activities and programme outcomes. Mentoring junior security professionals and promoting security best practice across delivery teams. What We're Looking For Proven experience as a Security Architect within complex enterprise or Defence environments. Strong background in cloud security architecture across multi-cloud and edge platforms. Experience implementing Secure by Design principles and DevSecOps practices. Expertise in: Threat modelling and risk management Policy-as-Code CI/CD security controls Software Supply Chain Security SBOMs, artefact signing and software provenance Excellent stakeholder management and communication skills. Previous experience working within UK Defence or other highly regulated environments. Experience leading technical security governance forums. Essential Requirements Active SC or DV Clearance. Sole UK National. CISSP (or equivalent security certification). TOGAF (or equivalent architecture certification). Previous experience supporting Defence programmes.
Role Title: Lead Security Architect Duration: contract to run until 23/11/2026 Location: Portsmouth. Hybrid 2-3 days per week onsite Rate: up to £616 p/d Umbrella inside IR35 Clearance required: Active DV Clearance and Sole UK National Role purpose/summary Mission: Own security architecture and the integration roadmap for AI/ML across multi-cloud and edge; align to client IT/cloud strategy and UK Defence priorities; enable secure multinational collaboration and high-side code promotions with repeatable assurance. Manage the Secure by Design elements of the project and own the assurance process end to end. Key Responsibilities Lead the Security elements of the program across different use cases for AI/ML development and trials. Chair Security Working groups and tri-nation collaboration. Manage security visibility and outcomes, manage senior stakeholder engagement. Threat and risk management; translate ambiguous requirements into testable controls. Define classification-aware architectures, trust boundaries, cross-domain data movement guardrails. Provide Security guidance and controls for complex program. Lead Security roadmap: DevSecOps, policy-as-code controls, risk-based CI/CD gates. Govern supply-chain security: artefact signing, SBOMs, provenance; adopt SLSA-style controls. Reduced lead time to secure release; zero-critical promotion checkpoints; supplier onboarding efficiency; executive risk communication. Mentor juniors Experience & Qualifications 5+ years in Cyber Security, proven multi-cloud/edge architecture. Defence experience; familiarity with UK guidance; eligibility for appropriate clearance, UK Sole national. Certifications: CISSP(equivalent), TOGAF Key Attributes This role requires essential skills of adaptability and a pragmatic and positive attitude towards security as a business enabler, the technical skills and aptitudes can be learned from the team All profiles will be reviewed against the required skills and experience. Due to the high number of applications we will only be able to respond to successful applicants in the first instance. We thank you for your interest and the time taken to apply! If you receive suspicious outreach claiming to be from us, please contact us via the ManpowerGroup website.
Jun 29, 2026
Contractor
Role Title: Lead Security Architect Duration: contract to run until 23/11/2026 Location: Portsmouth. Hybrid 2-3 days per week onsite Rate: up to £616 p/d Umbrella inside IR35 Clearance required: Active DV Clearance and Sole UK National Role purpose/summary Mission: Own security architecture and the integration roadmap for AI/ML across multi-cloud and edge; align to client IT/cloud strategy and UK Defence priorities; enable secure multinational collaboration and high-side code promotions with repeatable assurance. Manage the Secure by Design elements of the project and own the assurance process end to end. Key Responsibilities Lead the Security elements of the program across different use cases for AI/ML development and trials. Chair Security Working groups and tri-nation collaboration. Manage security visibility and outcomes, manage senior stakeholder engagement. Threat and risk management; translate ambiguous requirements into testable controls. Define classification-aware architectures, trust boundaries, cross-domain data movement guardrails. Provide Security guidance and controls for complex program. Lead Security roadmap: DevSecOps, policy-as-code controls, risk-based CI/CD gates. Govern supply-chain security: artefact signing, SBOMs, provenance; adopt SLSA-style controls. Reduced lead time to secure release; zero-critical promotion checkpoints; supplier onboarding efficiency; executive risk communication. Mentor juniors Experience & Qualifications 5+ years in Cyber Security, proven multi-cloud/edge architecture. Defence experience; familiarity with UK guidance; eligibility for appropriate clearance, UK Sole national. Certifications: CISSP(equivalent), TOGAF Key Attributes This role requires essential skills of adaptability and a pragmatic and positive attitude towards security as a business enabler, the technical skills and aptitudes can be learned from the team All profiles will be reviewed against the required skills and experience. Due to the high number of applications we will only be able to respond to successful applicants in the first instance. We thank you for your interest and the time taken to apply! If you receive suspicious outreach claiming to be from us, please contact us via the ManpowerGroup website.
Overview An established engineering organisation delivering secure, mission-critical technology solutions is seeking a Principal Software Engineering Manager to provide technical leadership across a portfolio of complex development programmes. This role combines strategic software leadership with hands-on technical oversight, supporting the delivery of embedded and application software solutions within highly regulated environments. You will work across multiple engineering disciplines, helping to shape software architecture, development practices, tooling, and technical direction while supporting a team of experienced software engineers. Key Responsibilities Provide technical leadership across multiple software projects, ensuring robust architectures, effective reuse of software components, and adoption of appropriate development tools and methodologies. Support software leads and project teams in defining software requirements, architecture, design approaches, and implementation strategies. Drive consistency in software engineering standards, processes, and best practice across development teams. Work closely with systems, hardware and firmware engineers to ensure integrated and coherent technical solutions. Support project planning activities, helping teams deliver value to customers through well-structured development roadmaps. Review software designs, architectures, and implementation approaches, providing guidance and resolving technical challenges where required. Promote modular software design and the creation of reusable software frameworks and components. Lead the adoption of modern software engineering practices including CI/CD, DevOps, DevSecOps, automated testing, and secure development principles. Champion continuous improvement initiatives relating to software tools, processes, standards, and ways of working. Mentor and develop engineers, supporting technical growth across the wider software function. Lead technical reviews and approve key engineering documentation. Contribute to customer proposals, bids and technical solution development, including effort estimation and risk assessment. Support information security and governance requirements in line with organisational and customer obligations. Skills & Experience Significant experience in software engineering leadership within a complex engineering environment. Strong background in one or more of the following: C/C++ Rust Embedded software development Real-Time Operating Systems (RTOS) Windows or Linux application development Device driver development Proven track record delivering complex software solutions throughout the full development lifecycle. Strong understanding of software architecture, design methodologies, coding standards, verification, validation and configuration management. Experience implementing software development best practice, including automated testing and continuous integration frameworks. Familiarity with version control, defect management and change management tools. Experience working within regulated industries such as defence, aerospace, space, communications or other safety/security-critical sectors. Knowledge of modelling techniques and tools such as UML, SysML or Enterprise Architect would be beneficial. Exposure to secure software development and cryptographic systems would be advantageous. Degree qualified in Software Engineering, Computer Science, Electronics Engineering, Mathematics, Physics or a related discipline.
Jun 26, 2026
Full time
Overview An established engineering organisation delivering secure, mission-critical technology solutions is seeking a Principal Software Engineering Manager to provide technical leadership across a portfolio of complex development programmes. This role combines strategic software leadership with hands-on technical oversight, supporting the delivery of embedded and application software solutions within highly regulated environments. You will work across multiple engineering disciplines, helping to shape software architecture, development practices, tooling, and technical direction while supporting a team of experienced software engineers. Key Responsibilities Provide technical leadership across multiple software projects, ensuring robust architectures, effective reuse of software components, and adoption of appropriate development tools and methodologies. Support software leads and project teams in defining software requirements, architecture, design approaches, and implementation strategies. Drive consistency in software engineering standards, processes, and best practice across development teams. Work closely with systems, hardware and firmware engineers to ensure integrated and coherent technical solutions. Support project planning activities, helping teams deliver value to customers through well-structured development roadmaps. Review software designs, architectures, and implementation approaches, providing guidance and resolving technical challenges where required. Promote modular software design and the creation of reusable software frameworks and components. Lead the adoption of modern software engineering practices including CI/CD, DevOps, DevSecOps, automated testing, and secure development principles. Champion continuous improvement initiatives relating to software tools, processes, standards, and ways of working. Mentor and develop engineers, supporting technical growth across the wider software function. Lead technical reviews and approve key engineering documentation. Contribute to customer proposals, bids and technical solution development, including effort estimation and risk assessment. Support information security and governance requirements in line with organisational and customer obligations. Skills & Experience Significant experience in software engineering leadership within a complex engineering environment. Strong background in one or more of the following: C/C++ Rust Embedded software development Real-Time Operating Systems (RTOS) Windows or Linux application development Device driver development Proven track record delivering complex software solutions throughout the full development lifecycle. Strong understanding of software architecture, design methodologies, coding standards, verification, validation and configuration management. Experience implementing software development best practice, including automated testing and continuous integration frameworks. Familiarity with version control, defect management and change management tools. Experience working within regulated industries such as defence, aerospace, space, communications or other safety/security-critical sectors. Knowledge of modelling techniques and tools such as UML, SysML or Enterprise Architect would be beneficial. Exposure to secure software development and cryptographic systems would be advantageous. Degree qualified in Software Engineering, Computer Science, Electronics Engineering, Mathematics, Physics or a related discipline.
