Lead Security Architect - SC Cleared

Role Title: Lead Security Architect (Defence DevSecOps and AI/ML) Location: Portsmouth - Hybrid 50% and 50% Duration: 23/11/2026 Day rate: £618 (Inside Ir35) Active SC Clearance required MUST BE PAYE THROUGH UMBRELLA Role Description: 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 andamp; Qualifications 5+ years in Cyber Security, ..... full job details .....