Cyber Security & Assurance Engineer - Defence

Infinity Systems Engineering LTD.; Henlow; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Infinity Systems Engineering LTD. in the United Kingdom is seeking a Cyber Security & Assurance Engineer to support a major MOD Air Defence programme.

You will provide specialist expertise across Cyber Assurance, Project Security and Security Engineering to ensure security requirements are managed throughout the project lifecycle. This hybrid role is based in Henlow, Bedfordshire with occasional site visits to MOD or supplier locations.

Qualifications

• Proven experience in at least two of the following: Cyber Assurance, Project Security or Security Engineering, with the ability to integrate all three.
• Experience developing Security Cases, security risk assessments and assurance documentation.
• Strong understanding of Secure by Design, cyber risk management and security controls.
• Experience reviewing technical designs, supplier documentation and compliance evidence.
• Knowledge of security assurance processes within Defence, Government or other regulated environments.
• Strong communication, stakeholder engagement and technical reporting skills.
• SC Security Clearance required.

Responsibilities

• Lead and coordinate Cyber Assurance, Project Security and Security Engineering activities.
• Develop and maintain Security Cases, risk assessments and security management documentation.
• Apply Secure by Design principles, including threat and vulnerability assessments.
• Review supplier security architectures, technical designs and assurance evidence.
• Identify security risks, compliance gaps and appropriate mitigation measures.
• Support security governance, technical reviews, working groups and project approvals.
• Provide specialist advice on information assurance, protective security, cryptography and supply-chain security.
• Support security acceptance and transition into service.

Skills

Cyber Assurance

Project Security

Security Engineering

Job description

Cyber Security & Assurance Engineer – Defence

Location: Henlow, Bedfordshire – Hybrid Working

Contract: Inside IR35

Duration: 7 December 2026 – 31 March 2027 with possible extensions

Security Clearance: SC Clearance Required

About The Role

Infinity Systems Engineering is seeking an experienced Cyber Security & Assurance Engineer to support a major MOD Air Defence programme. The successful candidate will provide specialist expertise across Cyber Assurance, Project Security and Security Engineering, supporting the development and assurance of mission-critical Defence radar capabilities. This is an opportunity to work alongside MOD stakeholders, engineering teams and industry partners, ensuring security requirements are effectively managed throughout the project lifecycle.

Key Responsibilities

• Lead and coordinate Cyber Assurance, Project Security and Security Engineering activities.
• Develop and maintain Security Cases, risk assessments and security management documentation.
• Apply Secure by Design principles, including threat and vulnerability assessments.
• Review supplier security architectures, technical designs and assurance evidence.
• Identify security risks, compliance gaps and appropriate mitigation measures.
• Support security governance, technical reviews, working groups and project approvals.
• Provide specialist advice on information assurance, protective security, cryptography and supply-chain security.
• Support security acceptance and transition into service.

Essential Skills & Experience

• Proven experience in at least two of the following: Cyber Assurance, Project Security or Security Engineering, with the ability to integrate all three.
• Experience developing Security Cases, security risk assessments and assurance documentation.
• Strong understanding of Secure by Design, cyber risk management and security controls.
• Experience reviewing technical designs, supplier documentation and compliance evidence.
• Knowledge of security assurance processes within Defence, Government or other regulated environments.
• Strong communication, stakeholder engagement and technical reporting skills.
• SC Security Clearance required.

Desirable Experience

• Knowledge of MOD / DE&S security processes, including GEAR, CADMID and DART.
• Experience supporting radar, operational technology, command-and-control or mission-critical systems.
• Familiarity with security accreditation, supply-chain assurance and protective security.

CISSP, CISM, CCP, Chartered Status Or Equivalent Professional Qualifications.

Additional Information

Hybrid working – approximately 1 day per week at Henlow and 1 day at other MOD, supplier or operational sites, subject to project requirements.

Initial contract until 31 March 2027.

Supporting a high-profile UK Air Defence capability programme.