Mechanical Commissioning Engineer - Nuclear Systems

ZipRecruiter; Bridgwater; Hybrid; GBP 40,000 - 60,000; Full time

Job summary

A leading engineering firm in Bridgwater is seeking a Mechanical Commissioning Engineer to support nuclear projects like Hinkley Point C. This hybrid role requires experience in mechanical commissioning and strong documentation skills. Candidates should hold a degree in Mechanical Engineering. Benefits include flexible working hours, a pension scheme, and professional fees reimbursement.

Benefits

Hybrid Working Opportunity

Flexible working hours

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

25 days' paid annual leave + bank holidays

Professional fees reimbursed

Employee referral scheme

Competitive Sick Pay

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

Free Digital Gym Access

24/7 Employee Support Line

Qualifications

• Experience in mechanical commissioning, maintenance, or plant operations.
• Familiarity with mechanical drawings and commissioning procedures.
• Ability to interpret data and write clear documentation.

Responsibilities

• Prepare commissioning documents and test procedures for assigned systems.
• Support readiness reviews and verify system pre-requisites are complete.
• Coordinate mechanical tests including flushing, leak tests, and pump runs.

Skills

Mechanical commissioning

Maintenance

Plant operations

Regulated environments

Document interpretation

Education

Degree in Mechanical Engineering

HNC in Mechanical Engineering

Job description

About Assystem

At Assystem, our mission is to accelerate the global energy transition. With over 7,500 Switchers worldwide, we combine engineering expertise, project management, and digital innovation to deliver major infrastructure programmes. In the UK, we're at the forefront of landmark projects including Hinkley Point C, Sizewell C, and future Small Modular Reactors (SMRs). By joining us, you'll be contributing to some of the most exciting and important engineering challenges of our time.

Please note: Due to project security requirements, visa sponsorship is not available for this position.

The Job Mission

This is a hybrid role, based in Bridgwater (Hinkley Point C). We can consider those within a commutable distance or open to relocation - with a relocation package available to support your move.

As a Mechanical Commissioning Engineer, you'll join the Nuclear Island team supporting key mechanical and process systems. Working with experienced leads, you'll take ownership of defined systems and support commissioning documentation, testing, and validation.

Responsibilities

• Prepare commissioning documents and test procedures for assigned systems.
• Support readiness reviews and verify system pre-requisites are complete.
• Coordinate mechanical tests including flushing, leak tests, and pump runs.
• Analyse test results and produce clear, concise technical reports.
• Ensure all activities meet nuclear, environmental, and safety standards.
• Work with design and site teams to resolve technical issues quickly.
• Track system changes using approved configuration control processes.
• Support hazard identification and risk assessments for test activities.
• Participate in field execution of inspections and walk-downs.
• Build technical knowledge of assigned systems and plant operations.

Qualifications

Essential Skills and Qualifications

• Experience in mechanical commissioning, maintenance, or plant operations.
• Experience in regulated or heavy industrial environments.
• Familiarity with mechanical drawings and commissioning procedures.
• Ability to interpret data and write clear documentation.
• Degree, HNC, or equivalent in Mechanical Engineering.
• UK - we cannot offer visa sponsorship.

Desired Skills

• Knowledge of pumps, valves, and process system testing.
• Understanding of CDM regulations and on-site safety.
• Experience in nuclear or process plant commissioning.
• Knowledge of fluid or radwaste system operations.
• Awareness of QA/QC processes and document control.
• Understanding of system turnover or handover procedures.
• Motivation to progress toward full system ownership.

Additional Information

Please note: Due to project security requirements, visa sponsorship is not available for this position.

Why Apply?

This is your chance to work on a project that defines the future of clean energy in the UK. You'll join a forward-thinking organisation where your contribution directly supports a safer, more sustainable world. If you're ready to take on the challenge and grow with your future team, apply today.

Benefits include:

• Hybrid Working Opportunity
• Flexible working hours
• 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

We are committed to equal treatment of candidates and promote, as well as foster all forms of 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.