Principal Mechanical Engineer

Whitehaven, England, GB On-site Full-time Posted September 2, 2026
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Company Description

Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. 

Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.

Job Description

  • 🛠️ Support Requirements Capture: Manage and challenge requirements for existing waste containers and interface equipment.
  • 📋 Support Engineering Activities: Assist as defined by the Engineering Manager.
  • 🤝 Mentorship: Provide guidance and assurance to Senior Engineers and Designers.
  • 📐 Determine Engineering Requirements: Assist in defining product requirements.
  • 🔧 Tolerances Understanding: Guide understanding of tolerances on interface drawings.
  • 📝 Compile Documents: Help in compiling Component Requirements Documents.
  • 📍 Site Surveys: Support site surveys and the production/review of survey reports.
  • ⚙️ DFMEA/PFMEA Support: Assist in Design and Process Failure Mode Effects Analysis.
  • 📑 Review Drawings: Check drawings and documents for accuracy.
  • 🔄 Deploy LFE: Identify and apply Lessons Learned from Experience for technical tasks.

Qualifications

  • 🎓 Experience: High-level technical competency and significant experience in a related field.
  • 🎓 Education: HNC (minimum).
  • 💡 Innovation: Ability to create and develop new ideas.
  • 🗂️ Project Documentation: Experience in preparing project documentation, processes, and reports.
  • 🤝 Stakeholder Management: Demonstrable success in managing stakeholders.
  • 📏 Drawing Standards: Strong understanding of BS8888 and ISO-GPS (ISO 8015).
  • 🔍 Technical Drawings: Ability to check technical drawings per BS8888 and ISO 8015.
  • 🔩 Engineering Background: Deep experience in design, manufacture, material selection, welding, fabrication, and machining techniques.
  • 🛡️ FMEA Knowledge: Familiarity with DFMEA and PFMEA.
  • 🗣️ Communication Skills: Excellent written and verbal communicator.

Additional Information

  • 🏗️ Regulated Industries: Experienced in delivering work for highly regulated industries.
  • ☢️ Nuclear Sector: Experience in the nuclear sector.
  • 🛠️ Nuclear Design: Familiarity or previous design experience with nuclear, including mechanical handling.
  • 💻 CAD Experience: Experience with CAD (Inventor).
  • 🛡️ Security Clearance: SC Clearance preferred or ability to obtain SC Clearance.

NOTICE TO CANDIDATES ON RECRUITMENT FRAUD - We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

Market insight

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Frequently Asked Questions

Where is the Principal Mechanical Engineer job located?
This position is on-site in Whitehaven, England, GB.
Is this a full-time or part-time position?
This is full-time position.
How do I apply for the Principal Mechanical Engineer position?
Click the "Apply Now" button on this page to be redirected to ASSYSTEM's official application page. No account on Jooglee is required.
When was this job posted?
This job was posted on September 2, 2026 and is currently listed as active on Jooglee.
Who is hiring for this position?
ASSYSTEM is hiring for this role in Whitehaven, England, GB. Click "Apply Now" to visit their careers page.

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