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.