Expleo is a trusted partner for end-to-end, integrated engineering, quality services, and management consulting for digital transformation. We help businesses harness technological change to successfully deliver innovation, improve resilience and support secure, regulated and operationally critical environments.As part of the Expleo UK Cybersecurity Practice, you will define and ensure the security architecture for a major UK defence maritime programme, supporting an autonomous surface vessel capability that is being matured towards a whole-ship system design review.This is a hands-on architecture role for an engineer who is comfortable designing across operational technology, IT, networks, and physical security, and who can serve as a design lead to naval architects, systems engineers, a digital system integrator, and subsystem owners. Because the platform is designed to operate crewless, the architecture must be fail-safe under compromise and maintain a defined minimum-risk state upon loss of the remote command-and-control link.You will own the security architecture and the asset baseline that underpins it, working to the Security Management Plan set by the Secure by Design lead and providing architectural evidence to support formal design review.The role requires strong secure-by-design architectural skills, deep IT and OT understanding, and the ability to translate risk and consequences into segmentation, controls, and defensible design decisions. Develop the security ..... full job details .....