The Opportunity Copello are supporting a leading Defence client in their search for a Test & Testability Expert to play a key role in shaping how systems are tested across their full lifecycle — from early concept through to production and in-service support. You’ll report into the Head of Test & Testability, with strong project links to the Project Chief Design Engineer, and act as a Subject Matter Expert across multiple programmes. As part of the Test & Testability Architecture team, you’ll help define smarter test strategies, improve Built-In Test architectures, and raise the quality and consistency of test specifications across projects — removing waste and focusing effort where it adds real value. This is a senior, influential role where your technical expertise will directly shape product quality, efficiency, and ways of working. What You’ll Be Doing * Own and define project test strategies and BIT architectures, including coverage requirements * Improve how test equipment requirements and specifications are written across programmes * Lead analysis of production test data to identify trends and diagnose failures * Model and analyse system test coverage and generate diagnostic instructions * Drive continuous improvement in ways of working across Test & Testability * Support Red Team reviews and critical issue resolution during development and manufacture * Support new product bids and early feasibility studies * Identify, document, and deploy best practice across the department * Mentor and support engineers within the Test & Testability team * Contribute to and lead technology and capability roadmaps What We’re Looking For * Degree-level education (or equivalent experience) * Significant experience in electronic test across the full project lifecycle * Strong background in: * Electronic circuit design, test, and failure analysis * Test equipment design * Requirements capture and specification * Design for Test (DfT) and testability * Proven ability to provide technical leadership across complex design projects * Experience influencing senior technical and business stakeholders * Willingness to travel within the UK and EU when required