Junior Mechanical Engineer - HVAC

Nuclear

Permanent /

Bridgwater

United Kingdom

11/05/26

On site

ABOUT ASSYSTEM

️ About Assystem

Assystem is a global leader in engineering, dedicated to accelerating the energy transition. In the UK, we’re powering progress on landmark projects like Hinkley Point C, Sizewell C, and next-generation Small Modular Reactors (SMRs). Our 8000+ Switchers blend deep engineering know-how with cutting-edge digital tools to help build a low-carbon world – faster, cleaner, and smarter.

Why Join the Community of Switchers?

Becoming a Switcher means joining one of the top three nuclear engineering companies in the world. You’ll work on technically complex projects that shape the UK’s energy future while gaining opportunities to grow your expertise in a fast-paced, collaborative environment.

JOB DESCRIPTION

This is a site-based role, though candidates must be within commutable distance of Bridgwater or open to relocating, with support available for the right individual.

As a Junior HVAC Engineer, you will support the delivery of HVAC systems across a major nuclear construction programme, gaining hands-on experience in a complex, highly regulated environment. You will play a key role in resolving on-site technical challenges and ensuring installation activities progress safely and efficiently.

Support HVAC installation works in line with engineering drawings and specifications
Assist in responding to technical queries raised by construction teams
Review field change requests and non-conformance reports for clarity and accuracy
Liaise with design and engineering teams to resolve site issues
Help track engineering issues and contribute to performance reporting
Identify and escalate installation or documentation non-conformances
Maintain clear communication between site teams and engineering stakeholders

️ Support consistent application of approved engineering solutions on site

MY PROFILE

Nuclear experience is not essential, but is of course welcome. If you have worked within a highly regulated environment, your skills and approach are highly transferable and of strong interest to us.

We also recognise that the perfect candidate rarely exists. If you feel you meet around 80% of the criteria and are motivated to develop further, we would strongly encourage you to apply

Degree in Mechanical Engineering or closely related discipline
️ Some experience within construction, engineering, or industrial environments
Understanding of HVAC systems or building services fundamentals
Strong problem-solving skills with a structured approach
️ Ability to communicate clearly with technical and non-technical stakeholders
High attention to detail when reviewing technical documentation
Collaborative mindset with willingness to learn from experienced engineers

️ Ability to manage workload in a fast-paced site environment

Ready to lead the way on one of the UK’s biggest clean energy builds?
Join a team where your skills will help power the future. Bring your mechanical expertise—and we’ll provide the platform to make your mark.

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

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.

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