Senior / Principal Mechanical Engineer – Nuclear (Civil & Defence) at AtkinsRéalis

Senior / Principal Mechanical Engineer – Nuclear (Civil & Defence) – Derby, England – Full‑time on site position offering great opportunities for career growth.

Overview

Are you an experienced Mechanical Engineer who is passionate about making the world a better place? Would you be excited to play a part in supporting the fight against climate change? Do you thrive in collaborative, creative environments? Are you looking for a challenging role that allows flexible working and work‑life balance? If this sounds like you, we would love to hear from you.
We are looking for Senior / Principal Mechanical Engineers to expand and grow our Derby office and meet increasing client demand in the region.
As a senior member of our team, you will lead engineering teams on a diverse range of complex projects, with opportunities to work within AtkinsRéalis design teams or be embedded directly into our clients’ major programmes.

Your role

You will be the person who keeps projects moving, bringing structure and clarity to fast‑paced work.
You will work closely with engineers, delivery teams and clients in both our offices and on client sites to deliver a wide range of complex mechanical engineering and multi‑disciplinary projects.
Your responsibilities include leading design and substantiation of mechanical equipment to the highest standards of safety, quality and efficiency, from technical input to bids, budgets and schedules, through feasibility studies, and into detailed design and construction.
You will liaise with, present to and influence stakeholders at all levels, building strong relationships and ensuring delivery of outstanding outcomes.

About you

You bring calm to complexity and thrive in fast‑paced environments.
You are naturally collaborative, build strong relationships and keep communication flowing.
You have experience designing and substantiating mechanical equipment such as handling systems, machinery, test rigs or components, using engineering tools and a structured design process.
You have worked in the UK nuclear defence industry and are motivated to continuously develop your skills while contributing to critical UK nuclear programmes.

Rewards & Benefits

Enjoy competitive salaries, flexible holiday allowances, hybrid working culture and a range of benefits you can tailor to suit your health, wellbeing, financial and lifestyle choices.
You will have access to extensive training and professional development opportunities to grow your skills and expertise.

Security clearance

This role may require security clearance; offers of employment will depend on obtaining the relevant clearance.
If required, the vetting process is delivered by United Kingdom Security Vetting (UKSV) and may require proof of UK residency of five years or longer.
If applying, please do not reference or include in your application or CV details of any current or previously held security clearance.

Equal Opportunities & Diversity

AtkinsRéalis is an Equal Opportunities Employer and values applications from all backgrounds, cultures and abilities.
We are a Disability Confident Leader and commit to offering interviews to all applicants with a disability who meet the essential criteria.
If you would like to be considered under this commitment, please let us know at the application stage.
We are committed to creating a culture where everyone feels that they belong, thrive and develop to be their best selves.

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