Job Title: Senior Mechanical Designer
Location: Warrington, Chesire or Preston, Lancashire + Hybrid Working Arrangements
Compensation: Competitive Salary + Benefits
Role Type: Full time / Permanent
Role ID: SF
Shape the future of nuclear engineering with innovative, industry‑leading design.
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 Senior Mechanical Designer at our Warrington or Preston sites.
The role
As a Senior Mechanical Designer, you’ll take on a role that’s truly out of the ordinary. You’ll be a key point of contact for engineering colleagues and stakeholders throughout the design lifecycle, contributing to reviews, resolving technical challenges and helping ensure robust, compliant design outcomes.
Day-to-day, you’ll be:
1. Allocating design tasks, supporting and guiding a team of Designers, and ensuring high‑quality discipline outputs.
2. Leading inter‑disciplinary coordination to meet regulatory and company standards.
3. Preparing and checking design drawings, ensuring compliance with ISO standards and project requirements.
4. Advising on the best methods, tools and techniques for design tasks and providing technical support to the design team.
5. Liaising with customers to support relationship development, resolve technical issues and ensure progress transparency.
This role is full‑time working 37 hours per week and is based at either our Warrington, Cheshire site or Preston, Lancashire, site and includes hybrid working arrangements.
Essential experience of the Senior Mechanical Designer:
6. Experience working in a detailed design environment.
7. Strong knowledge of CAD tools and engineering drawing practices.
8. Demonstrable experience providing technical leadership within a multi‑discipline design environment.
9. Incorporated Engineer status (desirable).
Qualifications for the Senior Mechanical Designer:
HNC/HND (minimum) in a relevant discipline or equivalent qualification.
Security Clearance
The successful candidate must be able to achieve and maintain Standard (BPSS) security clearance for this role. Further details are available at
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