Senior Security Architect – Defence & National Infrastructure

Company: Amentum
Apply for the Senior Security Architect – Defence & National Infrastructure
Location: Cardiff
Job Description:

Amentum is seeking an experienced Security Architect to design and oversee robust security architectures for ICT capabilities across critical national infrastructure and defence programmes. You will translate business needs into security requirements, align architectures with strategic goals, and lead risk analyses and incident response planning.

With 5 years of UK Defence security experience, you will work with firewalls, IDS/IPS, SIEM and other security technologies, producing clear technical

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Posted: October 1st, 2026