Mechanical Engineer

Jacobs; Cirencester; On-site; GBP 40,000 - 60,000; Full time

Job summary

A global engineering firm is seeking a Mechanical Engineer to join their Fusion team in the UK. This role involves overseeing mechanical project teams, delivering high-quality technical documentation, and ensuring compliance with safety requirements. Ideal candidates should have an engineering degree and a proven track record in project contribution. The company offers a competitive benefits package and emphasizes work-life balance.

Benefits

Free single medical cover

Enhanced parental leave pay

Reimbursement for professional development

Qualifications

• Proven track record in engineering project contributions.
• Experience with technical documentation and specifications.
• Solid understanding of mechanical and safety requirements.

Responsibilities

• Oversee project teams in mechanical engineering work.
• Deliver high-quality technical documentation and reports.
• Collaborate with team members and ensure safety compliance.

Skills

Mechanical engineering

Project management

Technical documentation

Safety compliance

Team collaboration

Education

Engineering degree

Tools

Fusion technologies

Technical software

Job description

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Mechanical Engineer -(EST0004WD)

Your Impact:

We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive and diverse team who always strive to do the right thing for our people, clients and communities.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent.

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships. We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.

Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

About the Opportunity

We are currently recruiting Mechanical Engineers at varying levels to join our Fusion team, which has recently won several important projects and has a host of exciting new opportunities in research, engineering, operations and decommissioning.

As one of the newest departments in Amentum, we are regularly involved in delivering on exciting bids and projects with several different fusion clients. The ideal candidate should have an engineering background, with a demonstrable track record of contributing to or leading projects effectively.

This role will be based in our Birchwood, Harwell or Culham office, with potential for periodic visits to client sites as projects require.

Amentum supports customers in energy generation, new build, decommissioning and defence sectors. We are involved in innovative projects like ITER, the world’s largest fusion experiment.

We are committed to tackling the climate emergency. Fusion power is a practical, pollution-free energy source that can produce large amounts of energy regardless of weather. We aim to help bring fusion power onto the grid.

Our reputation is built on safely delivering quality projects on time and within budget. We have expertise in managing large, complex projects internationally and in the UK, developing strong client relationships and utilizing cutting-edge technologies.

This role offers the opportunity to work on a variety of projects with diverse teams, collaborating closely with clients to achieve outstanding results in a stimulating environment.

The Fusion Mechanical Engineer will contribute to the delivery of fusion projects in the UK and internationally, including:

• Contributing within or overseeing project teams in mechanical work, from definition to execution of engineering work packages for innovative client solutions.
• Delivering high-quality technical documentation such as calculations, specifications, datasheets, and reports.
• Supporting decision-making processes with clear solutions.
• Collaborating effectively with team members.
• Considering conventional and nuclear safety in all work.
• Presenting engineering solutions to clients and during design reviews.
• Liaising with manufacturing teams and suppliers, defining requirements, and ensuring delivery to specifications.
• Assessing and reviewing trials to optimize solutions for clients.
• Ensuring mechanical, performance, and safety requirements are met, including verification and validation activities.

What You'll Need:

Primary Location: United Kingdom, Didcot, UK Harwell Thomson Avenue HQ Building

Travel: Yes, approximately 10%

Job Posting: Jul 25, 2025, 1:15:43 PM

Job: Mechanical

Organization: CMS

Job Type: Experienced, Full-time, Regular

Work Locations: UK Harwell Thomson Avenue HQ Building, Didcot, OX11 0GD

Capabilities include Nuclear Cleanup and Decommissioning.