Nuclear Mechanical Commissioning Engineer – Derby

Assystem is seeking a Mechanical Commissioning Engineer to join the on-site commissioning team at a Nuclear Licensed Site in Derby. The role starts with a 2-shift pattern (Mon–Fri) and may move to 3 shifts from February 2026, supporting commissioning of gas, fluid and vacuum systems and safety-related equipment.

Key tasks include authoring test procedures, recording results, conducting tests, and coordinating with vendors and internal teams to ensure safe, compliant commissioning across nuclear

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