Security Engineer (Contractor)

SmartRecruiters, Inc.; Croespen-maen; On-site; GBP 92,000 - 129,000; Part time

Job summary

General Dynamics Mission Systems is seeking a contractor to deliver security engineering expertise within CIS and Cyber domains. You will collaborate with project teams to develop security artifacts, provide security authority, and guide engineering decisions with PKI focus.

The role requires defence-domain experience, accreditation knowledge across IS1/IS2, ISO27001 and related standards, and the ability to produce traceable security designs and documentation. Start Nov/Dec 2026.

Qualifications

• Experience in large, complex systems within a security context and proven security design work through accreditation.
• Experience with PKI and its implementation within complex systems.
• Familiar with Security Architectural Frameworks (IS1/IS2, ISO27001, NIST/NCIA or NATO standards) and security governance.

Responsibilities

• Work with Technical Project Managers and Solution Design Team to create required security deliverables.
• Provide security authority and guidance to the project, ensuring Security is part of all Engineering decisions.
• Provide expertise in PKI and development of PKI aspects of the solution.
• Support generation and maintenance of project level security documentation.
• Develop and support assurance for all project Security outputs.
• Ensure traceability of security design to requirements.

Job description

General Dynamics Mission Systems engineers a diverse portfolio of high technology solutions, products and services that enable customers to successfully execute missions across all domains of operation. With a global team of more than 13,000 top professionals, we partner with the best in industry to expand the bounds of innovation in the defence and scientific arenas. In the UK, we are leading the way in avionics and communication systems. Given the nature of our work and who we are, we value trust, honesty, alignment and transparency.

Job Description

We are looking to engage a Security Engineer (Contractor)to work on a project within the CIS and Cyber domains. The role will be responsible for providing security domain expertise. Ideal candidates will come from a defence background, with experience implementation and compliance with Security Architectural Frameworks such as: Infosec Standard 1&2 (IS1&2), ISO27001 and excellent knowledge of security defence standards, policies and guidelines.

Tasks include:

• Work with the Technical Project Managers and the Solution Design Team to create required security deliverables for the project.
• Provide security authority and guidance to the project, ensuring Security is part of all Engineering decisions.
• Provide expertise in PKI and the development of the PKI aspects of the solution
• Support the generation and maintenance of project level security documentation
• Develop and support assurance for all project Security outputs.
• Hands on experience of Model Based System Engineering
• Development and implementation of open architectures
• Deliver a coherent, integrated, and layered Security Architecture.
• Ensure risks and issues are within the boundaries of the Accreditors risk appetite through identification of appropriate risk mitigations.
• Liaise as required with the customer Security representative and produce supporting artefacts for SyTLMs.
• Traceability of security design to requirements
• Assist in the conduct of secure configuration and integration activities.
• Work with the wider Design team to ensure implementations are compatible with the Security Design.
• Work with the wider test team to provide evidence from security functional tests

Qualifications

You will have experience in large, complex systems across all phases of the project lifecycle in a security context and will have produced security designs, and successfully have taken these through accreditation, and into support. You will have experience of PKI and its implementation within complex systems.

Previous experience of implementation and compliance with any of the following Security Architectural Frameworks:

• System Administration and Networking and Security (SANS) Institute Framework;
• National Institute of Standards Technology Framework SP 800-53;
• National Institute of Standards Technology Cyber Security Framework
• NATO Communications Information Agency (NCIA) Standards;
• ISO 27001 (2013); BS ISO/IEC 27001:2013;
• European Directive on security of Networks and Information Systems Directive (NIS Directive); and any other demonstrably relevant standard or framework (SABSA, COBIT etc.)

Additional Information

General Dynamics Mission Systems utilises QDOS IR35 Status Review. The requirements of this contract have been evaluated asOutside IR35- Prior to the engagement start you will need to complete a status questionnaire in order to receive the finalised status determination.

All successful/appointed applicants must be able to obtain a level of UK Security clearance that is appropriate for the role and undertake suitable Right to work checks.

We are looking for a contractor to be available to start in this position November/December 2026.

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