Location: Aldermaston Onsite 1-2 days per week. Duration: 2 years

We are seeking a DV Cleared OT Cyber Security Engineer with strong expertise in Secure by Design (SbD) principles to join a high-profile Defence programme. This is a critical role ensuring that Operational Technology (OT) environments are protected against evolving cyber threats while remaining resilient, safe, and compliant with security standards. The successful candidate will be responsible for designing, implementing, and reviewing OT security controls across complex systems, supporting both engineering and assurance activities.

Key Responsibilities Apply Secure by Design principles throughout the engineering lifecycle. Conduct threat modelling, risk assessments, and security design reviews for OT environments. Work closely with engineering and project teams to embed security into delivery. Produce and review security documentation in line with MOD/Defence standards. Provide SME input on OT security to stakeholders across projects.

Essential Skills & Experience Active UK DV Clearance (mandatory). Security Practitioner Strong background in Operational Technology. Demonstrable experience applying MOD/Nuclear Secure by Design (SbD) principles. Proven experience in security architecture an...