Mechanical Engineers - All Levels

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.

These opportunities are suited to candidates within commuting distance of Bridgwater or Bristol, depending on role requirements.

We are seeking Mechanical Engineers across Graduate, Engineer, Senior, Lead and Principal levels.

You will support the delivery, commissioning and operational readiness of critical nuclear mechanical systems.

Deliver engineering solutions across mechanical, piping, HVAC and process systems

⚙️Support commissioning, testing and validation of mechanical systems

️Contribute to construction, installation and equipment engineering activities

Support system turnover, handover and operational readiness programmes

Resolve technical issues, site queries and engineering challenges

Coordinate contractors, suppliers and multidisciplinary project stakeholders

Review technical documentation, design changes and construction modifications

️Ensure compliance with nuclear safety, quality and regulatory requirements

Manage interfaces across engineering, construction and commissioning teams

Support major project milestones through to operational readiness

Mechanical Engineering degree or relevant technical qualification and experience

⚙️Experience in mechanical systems, equipment or engineering delivery

Background in piping, HVAC, rotating equipment or pressure systems advantageous

Commissioning, testing, installation or construction experience highly valued

️Experience delivering complex engineering or infrastructure projects

️Experience working within regulated or safety-critical environments

Strong communication and stakeholder management capabilities

Excellent technical problem-solving and analytical skills

Commitment to quality, safety and engineering excellence

⚡Nuclear, energy, defence or major infrastructure experience advantageous

Build Your Future in Nuclear Engineering

Whether you are beginning your engineering career or bringing decades of specialist experience, this is an opportunity to contribute to one of the UK's most significant infrastructure projects. Join a global engineering community, work on complex nuclear systems and build a career around missions that will have an impact for generations.

Benefits include:

Hybrid Working Opportunity

Flexible working hours

️ Market Leading Pension scheme (8% company contribution / 4% personal contribution)

️ 25 days’ paid annual leave + bank holidays + option to buy or sell days

Professional fees reimbursed

Employee referral scheme

Competitive Sick Pay – Support when you need it

Income Protection & 3x Salary Death-in-Service Cover

Free Digital Gym Access – Expert-led fitness classes

24/7 Employee Support Line – Mental health, financial & legal help

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.