Senior IT Solutions Architect for Defence & Security

Amentum is seeking an experienced IT Architect to join our Cardiff-based team working across Defence, Nuclear and critical national infrastructure projects. You will define IT architecture, translate requirements into blueprints, and drive scalable, secure solutions.

The role requires five years of delivering complex IT systems, strong stakeholder engagement, and the ability to mentor teams. You will collaborate across disciplines to ensure safety, security by design, and alignment with

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