Job Title: Mechanical Engineer
Location: Whitehaven, Cumbria + Hybrid Working Arrangements
Compensation: Competitive Salary + Benefits
Role Type: Full time / Permanent
Role ID: SF
Help Shape the Future of Nuclear Decommissioning
At Cavendish Nuclear, we’re working to create a safe and secure world, together. If you join us, you can play your part as a Mechanical Engineer at either of our Westlake’s Science Park, Moor Row or Warrington, Cheshire sites.
The role
As a Mechanical Engineer, you’ll join our expanding Design Services Alliance Task Team, contributing to some of the UK’s most significant clean‑energy and civil decommissioning programmes. This is an opportunity to work on technically diverse, highly regulated engineering projects that directly support the safe deconstruction and futureproofing of nuclear facilities.
You’ll be part of a multidisciplinary engineering community, collaborating across design, safety, and project teams. Your work will help enhance plant performance, improve engineering standards, and develop innovative solutions that support essential national infrastructure—while accelerating your own technical and professional growth.
Day-to-day, you’ll have the following responsibilities:
1. Driving effective collaboration across engineering and project delivery teams
2. Acting as a technical interface with customers, suppliers, and wider stakeholders
3. Conducting technical investigations and analysis to improve designs and resolve issues
4. Ensuring correct application of engineering codes, standards, and safety requirements
5. Supporting development of design specifications, models, and documentation.
This is a full‑time role working 37 hours per week based at either of our Westlake’s Science Park, Moor Row or Warrington, Cheshire sites with occasional travel to other project sites as required.
Essential experience of the Mechanical Engineer
6. Proficiency with CAD tools and strong knowledge of general engineering drawing practice
7. Ability to build strong, influential relationships with key stakeholders
8. A proactive, delivery‑focused mindset with the confidence to challenge and improve existing approaches.
Qualifications for the Mechanical Engineer
9. Engineering degree (or equivalent) in a relevant mechanical or engineering discipline.
Security Clearance
The successful candidate must be able to achieve and maintain Standard (BPSS) security clearance for this role. Further details are available at United Kingdom Security Vetting: clearance levels - GOV.UK (
What we offer
10. Generous holiday allowance
11. Matched contribution pension scheme, with life assurance
12. Access to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+
13. Employee share scheme
14. Employee shopping savings portal
15. Payment of Professional Fees
16. Reservists in the armed forces receive 10-days special paid leave
17. Holiday Trading is a benefit that allows UK Cavendish employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement. This Window opens February through to March annually.
18. ‘Be Kind Day’ enables employees to take one working day's paid leave a year (or equivalent hours) to undertake volunteering work with their chosen organisation or registered charity
19. Excellent development opportunities and benefits package including an employee assistance programme supporting physical, mental and financial wellbeing.
Cavendish Nuclear
As a leader within the UK nuclear industry, Cavendish Nuclear, part of