Lead Security Architect

Salary: £38,000 - 68,000 per year

Requirements

: We require DV clearance and eligibility for the appropriate clearance level, including UK sole nationality.We are looking for someone with at least 5 years of experience in Cyber Security.We need proven experience in multicloud and edge architecture.We require Defence experience and familiarity with UK guidance.We are seeking CISSP or equivalent certification.We require TOGAF certification.We value adaptability and a pragmatic, positive attitude toward security as a business enabler. Responsibilities: We lead the security elements of the programme across different use cases for AI/ML development and trials.We chair Security Working Groups and tri-nation collaboration.We manage security visibility, outcomes, and senior stakeholder engagement.We handle threat and risk management and translate ambiguous

Requirements

into testable controls.We define classification-aware architectures, trust boundaries, and cross-domain data movement guardrails.We provide security guidance and controls for complex programmes.We lead the security roadmap, including DevSecOps, policy-as-code controls, and risk-based CI/CD gates.We govern supply chain security, including artefact signing, SBOMs, provenance, and SLSA-style controls.We work to reduce lead time to secure release, support zero-critical promotion checkpoints, improve supplier onboarding efficiency, and communicate risk to executives.We mentor junior team members. Technologies: AIArchitectCI/CDDevSecOpsSupportSecurityTOGAF More: We are a Defence-focused client offering a Lead Security Architect opportunity in Hampshire, with a 50% office-based and 50% remote working arrangement. The role is inside IR35 and is offered at £650 per day.

You will help shape the security architecture and integration roadmap for AI/ML across multicloud environments, working in a pragmatic environment where security is valued as a business enabler. Our team supports complex programmes and collaboration across stakeholders, with opportunities to influence roadmap, controls, and mentoring within a defence context. last updated 35 week of 2026