Mechanical Engineer Nuclear Jobs at AtkinsRéalis | jobs in UK

AtkinsRéalis is a global engineering services and nuclear organisation that connects people, data, and technology to transform infrastructure and energy systems. The company works with clients and industry partners to deliver complex projects that support a safer, more sustainable future.

With opportunities across the UK, AtkinsRéalis offers engineers the chance to work on major nuclear programmes, develop specialist skills, and contribute to projects that address climate change and the future of energy.

Role Overview

As a Mechanical Engineer – Nuclear, the successful candidate will support the delivery of complex mechanical engineering and multidisciplinary projects. The role is available across locations including Derby, Bristol, Sheffield, and Glasgow, with a primary focus on expanding the Derby office in response to increasing client demand.

The Mechanical Engineer will work within AtkinsRéalis design teams or directly with clients as part of major programmes. Depending on their experience and interests, they may contribute to reactor operations, power new-build projects, decommissioning programmes, nuclear-powered submarine projects, small modular reactors, or fusion energy developments.

The role provides an opportunity to apply existing engineering expertise while developing new skills across the full UK nuclear industry.

Key Responsibilities as Mechanical Engineer – Nuclear

• Design and substantiate mechanical equipment to high standards of safety, quality, and efficiency.

• Support the continued operation and life extension of the UK’s nuclear power stations and nuclear-powered submarines.

• Contribute to major projects across reactor operations, power new build, decommissioning, and nuclear defence.

• Support programmes involving Hinkley Point C, Sizewell C, small modular reactors, and fusion energy reactors.

• Help deliver the safe dismantling, processing, and packaging of nuclear waste across the UK nuclear estate.

• Provide technical input to bids, budgets, programmes, and project schedules.

• Work with clients to assess feasibility and develop engineering solutions.

• Deliver design and substantiation work across all stages of the project lifecycle, from concept development through to detailed design and construction.

• Manage technical activities, timescales, and priorities across complex projects.

• Identify problems, develop practical solutions, and help teams deliver right-first-time outcomes.

• Provide technical guidance and support to junior engineers.

• Liaise with, present to, and influence internal and external stakeholders.

• Build effective working relationships with clients, colleagues, and project partners.

• Work collaboratively across multidisciplinary engineering teams and client sites.

Job Details

• Job title: Mechanical Engineer – Nuclear

• Company: AtkinsRéalis

• Job type: Full time

• Locations: Derby, Bristol, Sheffield, and Glasgow

• Reference: R-162652

• Working arrangement: Flexible and hybrid working options may be available

• Salary: Competitive salary, depending on experience

Security Clearance

This position may require security clearance. Any offer of employment may depend on the successful candidate obtaining the relevant level of clearance.

Where required, the clearance process will be discussed during the interview stage. Candidates may need to provide proof of five years or more of UK residency as part of the United Kingdom Security Vetting process.

Applicants should not include information about current or previous security clearance in their CV or application.

Start a Career With AtkinsRéalis

AtkinsRéalis offers Mechanical Engineers the opportunity to work on challenging nuclear and engineering programmes that support the future of energy and critical infrastructure. The company encourages curiosity, care, courage, and community while providing employees with the support needed to develop their careers.

Whether the candidate has established nuclear experience or is transferring valuable expertise from another engineering sector, this role offers the opportunity to work on nationally significant projects and contribute to a more sustainable future.

AtkinsRéalis is committed to equality, diversity, and inclusion. The company welcomes applications from people of all backgrounds, cultures, abilities, and experiences.

Apply Now

Apply now for the Mechanical Engineer – Nuclear position with AtkinsRéalis and help deliver safe, innovative, and sustainable engineering solutions across the UK nuclear industry.