Principal/Senior Mechanical Engineer - Nuclear

Principal/Senior Mechanical Engineer - Nuclear

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Job Title: Principal/Senior Mechanical Engineer (Nuclear)

Location: Warrington (Hybrid: 3 days onsite, 2 days WFH)

Salary: Competitive

Job Type: Permanent | Full Time

About The Role

iO Associates is currently working with a leading engineering organisation involved in major UK nuclear projects. We're recruiting for a Principal/Senior Mechanical Engineer with expertise in bulk solids or powder handling systems, ideally for nuclear or other highly regulated sectors.

This is a unique opportunity to contribute to the safe and effective management of radioactive or hazardous powdered materials-ranging from fuel fabrication to waste processing-within complex engineering environments. Multiple positions are avaliable.

Key Responsibilities

• Lead the design, integration, and review of powder handling systems (e.g., hoppers, feeders, pneumatic conveyors, gloveboxes).
• Apply engineering standards and nuclear safety principles across all design and project stages.
• Produce and review technical documentation, including calculations, drawings, reports, and risk assessments.
• Collaborate with multi-disciplinary teams including nuclear safety, process, and systems engineers.
• Provide engineering oversight to ensure compliance with safety cases and relevant codes.
• Support customer engagement, stakeholder management, and technical mentoring of junior engineers.
  
  

• Background in mechanical engineering with strong exposure to bulk solids/powder handling, ideally in a regulated environment (nuclear, pharma, chemical, etc.).
• Proven ability to design or evaluate mechanical systems involving containment, flow control, or automated powder transfer.
• Experience in producing and reviewing detailed technical documents and engineering calculations.
• Collaborative approach to problem-solving across project teams.
  
  

• Experience with glovebox or hot cell design.
• Knowledge of critically safety, ALARP, and radiological containment.
• Prior exposure to nuclear decommissioning, new build, or fuel cycle facilities.
  
  

• Degree preferred.
• Chartered or working towards professional registration (e.g., IMechE) is advantageous.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Machinery Manufacturing

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