Senior Product Security Engineer

Product and Systems Security Engineering Role

General Dynamics Mission Systems is seeking a dedicated Security Engineer to join our team in St Leonards-on-Sea, contributing to the development of future combat-air capability as part of the GCAP programme. This role focuses on embedding security into complex, safety-critical airborne mission systems, ensuring robust engineering solutions address identified security risks.

Key Responsibilities:

• Develop and maintain security requirements for complex airborne electronic and mission-computing systems.
• Undertake threat modelling, vulnerability analysis, and security risk assessments throughout the engineering lifecycle.
• Support the development of security architectures and secure-by-design solutions.
• Produce the security evidence, documentation, and assurance arguments needed to support accreditation.
• Work closely with systems, software, hardware, safety, and certification engineers to embed security within the overall product design.
• Review proposed designs and identify security weaknesses, risks, and proportionate mitigations.
• Engage with customers, partners, and internal engineering teams on product-security requirements and technical decisions.
• Contribute to the development of technologies supporting future combat-air capability.

Essential Experience:

• Experience in product security, systems security, cyber-security engineering, or security assurance within a complex engineering environment.
• Knowledge of Secure by Design principles and relevant product and systems security standards, with experience embedding security throughout an engineering lifecycle.
• Experience undertaking security risk assessments, threat modelling, vulnerability analysis, or security requirements development.
• Ability to interpret technical designs and communicate security risks and mitigations to multidisciplinary engineering teams.
• Experience producing clear technical documentation and security assurance evidence.
• Degree-level qualification in engineering, computer science, cyber security, or a related discipline, or equivalent relevant experience.

Desirable Experience:

• Experience within aerospace, defence, safety-critical systems, embedded systems, or another highly regulated sector.
• Knowledge of mission systems, avionics, embedded computing, real-time systems, or secure communications.
• Experience supporting product accreditation, certification, or formal security-assurance activities.
• Experience using requirements-management, risk-management, or security-analysis tools within a structured engineering environment.
• Experience working within a model-based or requirements-led systems-engineering environment.
• Experience working with or familiarity with AI/ML models is preferred.

Benefits and Work Environment:

This role offers a salary between £45,600 - £60,000 plus a flexible benefits package. We support a hybrid working model (typically 3 days in office) or fully office-based. Enjoy benefits such as a compressed nine-day fortnight (every other Friday off), personalized career development plans, and a flexible working environment. General Dynamics Mission Systems is committed to fostering a diverse and inclusive workplace. We are a Disability Confident Employer and welcome applications from all backgrounds.

Successful applicants will be required to obtain an appropriate level of UK Security clearance and undertake suitable Right to Work checks.