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Senior Mechanical Designer - PFDO Project (Sellafield)
Contract | £35-£42/hour (Inside IR35)
Warrington | Hybrid - 3 days on site / 2 days remote
Sector: Nuclear | PFDO Programme

Are you an experienced Senior Mechanical Designer looking to contribute to one of Sellafield's high-profile decommissioning projects? This is a hands-on role supporting the PFDO (Post-Fuel Decommissioning Operations) project, delivering high-quality mechanical designs and technical drawings for safety-critical systems.
You'll work within a collaborative engineering team, supporting design development, technical documentation, and integration with wider project disciplines. The role offers a hybrid working arrangement, with three days per week in Warrington for team collaboration and site engagement.

Key Responsibilities

Develop and produce mechanical designs, layouts, and technical drawings for PFDO systems
Review and update existing designs to meet project requirements and standards
Ensure designs comply with Sellafield design processes, safety requirements, and engineering standards
Collaborate with multi-discipline teams, including CE&I, structural, and project engineering colleagues
Support the preparation of technical documentation, specifications, and design packages
Mentor and provide guidance to junior designers where required
Requirements

Proven experience as a Mechanical Designer within nuclear or highly regulated sectors
Strong knowledge of mechanical design principles, CAD tools (e.g., AutoCAD, SolidWorks, or MicroStation)
Understanding of nuclear design standards, site procedures, and safety requirements
Ability to produce clear, accurate, and compliant technical drawings and documentation
Good communication and collaboration skills
SC clearance preferred or the ability to obtain
Why Join?

Competitive £35-£42/hour (Inside IR35)
Hybrid working - balance of 3 days in Warrington and 2 days remote
Work on a nationally significant nuclear decommissioning programme
Opportunity to influence mechanical design solutions in a complex, safety-critical environment
Join an experienced, collaborative team with strong technical leadership
Apply now to bring your mechanical design expertise to the PFDO project at Sellafield and contribute to one of the UK's most important nuclear programmes