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Senior Principal Mechanical Engineer — Fusion & Nuclear

Job in Warrington, Cheshire, MK46, England, UK
Listing for: Assystem
Full Time position
Listed on 2026-10-11
Job specializations:
  • Engineering
    Mechanical Engineer
  • Energy/Power Generation
Salary/Wage Range or Industry Benchmark: 90000 - 120000 GBP Yearly GBP 90000.00 120000.00 YEAR
Job Description & How to Apply Below

Assystem is seeking a Senior Principal Mechanical Engineer to join its Fusion and Modular Nuclear unit in the UK. You will lead designs for cooling water systems and related reactor components, driving DFMEA/HAZID activities and managing interfaces across engineering teams and suppliers.

This role requires Chartered Engineer status, SC clearance eligibility, and the ability to work in a hybrid environment with some UK travel.

We are looking to fill the Senior Principal Mechanical Engineer — Fusion & Nuclear position at Assystem in Warrington, England, United Kingdom.

Consider building your career as a Senior Principal Mechanical Engineer — Fusion & Nuclear at Assystem.

The Senior Principal Mechanical Engineer — Fusion & Nuclear position in the Engineering field is open for applications.

We have an opening for a Senior Principal Mechanical Engineer — Fusion & Nuclear in Warrington, England, United Kingdom within Engineering.

Position Requirements
10+ Years work experience
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