Mechanical Commissioning Engineer - Nuclear Fuel Handling
Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Sep 28, 2026. Assystem scores B on the Alion truth index.
About Assystem
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.
Why Join the Community of Switchers?
As a member of Assystem, you'll be part of a team driving the low-carbon energy future. We’re ranked second globally in nuclear engineering, offering you the chance to work on world-class projects like Hinkley Point C. Together, we’ll innovate and shape tomorrow’s energy solutions.
This role supports major nuclear programmes and is ideally suited to candidates within commuting distance of Bridgwater or those willing to relocate with relocation support available.
You will lead commissioning activities for critical radioactive waste systems across a major nuclear project.
The role combines commissioning delivery, technical leadership and stakeholder engagement throughout project lifecycle phases.
Develop commissioning documentation supporting testing and system validation activities
Manage full commissioning lifecycle for multiple radioactive waste systems
Review plant designs to optimise commissioning and operational readiness
Lead commissioning test programmes and analyse commissioning results
Supervise contractor commissioning personnel during on-site activities
Produce reports demonstrating system readiness and commissioning outcomes
Collaborate with designers, contractors and operational stakeholders
Ensure compliance with nuclear safety and regulatory requirements
Support commissioning planning, milestones and project delivery objectives
Maintain safe and effective interfaces throughout commissioning activities
Degree, HNC/HND in Mechanical, Nuclear, Process or Power Engineering
Strong knowledge of mechanical systems within industrial environments
Experience commissioning large industrial or power generation systems
Nuclear sector experience, particularly Nuclear Island systems preferred
Experience developing commissioning procedures and test documentation
Knowledge of nuclear safety requirements and regulatory compliance
Strong understanding of commissioning methodologies and system validation
Excellent communication and stakeholder management capabilities
Strong planning, coordination and organisational skills
Fluent English communication skills, written and verbal
What we offer
Hybrid Working - Flexibility to work from home and the office
25 Days Annual Leave + Bank Holidays
Buy & Sell Holiday - Make your time off work for you
8% Company Pension Contributions
Income Protection & 3x Salary Death-in-Service Cover
Competitive Sick Pay - Support when you need it
Healthcare Cash Plan - Claim back on dental, optical & more
Free Digital Gym Access - Expert-led fitness classes
Exclusive Discounts - Restaurants, days out & top brands
24/7 Employee Support Line - Mental health, financial & legal help
Cycle to Work Scheme - Save money & go green
Free Flu Jabs & Eye Test Vouchers
Paid Professional Membership Fees
Volunteer Days - Make a difference on company time
Join Assystem and contribute to delivering sustainable and innovative engineering solutions for the Hinkley Point C project.
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.