Principal Engineer - Product Security

In this role you define and implement risk-based cybersecurity requirements for systems and subsystems, guiding across cyber security and resilience. You conduct in-depth analysis, develop threat taxonomies and security artefacts, and drive security testing and assurance. You support secure engineering lifecycle reviews to embed security in development. You’ll work with cross-functional teams to shape secure submarine platform solutions and risk management. This is a hands-on, impact-focused opportunity in a mission-driven, defence context.

• hybrid working options
• relocation support packages for submarine roles
• competitive salary
• lifelong learning and personal development
• support for wellbeing
• inclusive culture

• Define and implement risk-based cybersecurity requirements for systems and subsystems
• Conduct cybersecurity analysis, develop threat taxonomies, security architectures, baselines, and risk mitigation strategies
• Develop and execute cybersecurity test plans and formal/informal testing activities
• Support engineering lifecycle reviews and design assurance for security integration
• Produce and maintain security artefacts (risk registers, assurance cases, plans, schedules) and contribute to broader engineering documentation
• Engage with customers, users, and stakeholders to explain risk causes, likelihood, and operational impact
• Identify, analyse, evaluate and manage information security risks for submarine products
• Provide security input to engineering documentation and cross-functional teams

• Degree in a relevant STEM subject or recognised Industry Security Qualifications (e.g., CCP, CISSP)
• Proven experience assessing and managing risk per industry practices (NIST, ISO 27001)
• Extensive experience with security baselines, mitigations and controls
• Familiarity with a life cycle phased (systems engineering) approach

• Credible communication with customers and stakeholders
• Collaborative cross-functional teamwork
• Analytical and problem-solving mindset
• Risk-based cybersecurity
• Security architectures and baselines
• Threat modelling and security testing