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Senior or Principal Mechanical Engineer

Posted: 18/11/25
Recruiter:Highfield Professional Solutions Ltd
Reference:3029507512
Type:Contract
Disciplines: Engineering
Salary:£51 - £61 Hourly Inside IR35
Location:Cumbria
Description:


Contract Opportunity: Senior / Principal Mechanical Engineer - Hybrid (Sellafield Projects)
Rate: 51- 61 per hour (Inside IR35)
Location: Hybrid - 3 days per week in Cumbria office
Sector: Nuclear - Task Delivery Projects

Are you an experienced Mechanical Engineer ready to lead and deliver complex projects for Sellafield? We are seeking a Senior or Principal Mechanical Engineer to provide technical expertise and drive the delivery of task-based projects across the site. This hybrid role combines focused on-site work in Cumbria with the flexibility to work remotely.

Key Responsibilities:


  • Deliver and manage mechanical engineering tasks across multiple project stages

  • Develop and review designs, calculations, and technical documentation

  • Ensure compliance with Sellafield standards, nuclear safety requirements, and site licence conditions

  • Support design reviews, risk assessments, and HAZOP activities

  • Mentor and guide junior engineers, providing technical leadership and assurance

  • Collaborate with multi-discipline teams to achieve project objectives efficiently


What We're Looking For:


  • Proven experience as a Senior or Principal Mechanical Engineer in nuclear or highly regulated environments

  • Strong technical knowledge in mechanical systems, structures, and process equipment

  • Experience delivering task-based projects with attention to schedule and quality

  • Familiarity with Sellafield design processes and standards (advantageous)

  • SC clearance preferred (or ability to obtain)


This is your chance to work on high-profile projects at the forefront of nuclear engineering while benefiting from a hybrid working arrangement, spending 3 days per week in Cumbria.
Apply now to take your mechanical engineering expertise to the next level on Sellafield projects!

Recruiting now