Job Title: Modular Reactor Systems Engineering Lead
Location: Flexible, UK
Compensation Attractive Salary + Benefits
Role Type: Full time / Permanent
Role ID: SF
Shape The Future of Clean, Secure Energy at The Heart of UK Nuclear Innovation
The UK’s small and advanced modular reactor sector is entering a pivotal phase, with major programmes progressing and strong government backing.
Join us as a Modular Reactor Systems Engineering Lead at the centre of this momentum and build your career across the nuclear and defence sector.
The role
We’re seeking a Modular Reactor Systems Engineering Lead to join our Advanced Nuclear Technologies team, working in a fast‑moving, innovation‑led environment with real national impact. You’ll help shape the next generation of nuclear power through cutting‑edge design, accelerated deployment and projects that strengthen the UK’s long‑term energy resilience. If you want your work to matter at scale, this is the role for you.
This is a full‑time role working 37 hours per week. The role is based flexibly across our UK locations, with ad hoc travel to the North West, including Warrington and Manchester, as required. Hybrid working patterns are available, balancing flexibility with the needs of a highly collaborative engineering programme.
Day-to-day, you’ll be required to:
1. Leading systems engineering activities across complex modular reactor and nuclear design programmes
2. Providing technical leadership and decision‑making authority across the full engineering lifecycle
3. Delivering and assuring high‑quality designs, analyses, calculations and technical documentation
4. Leading engineering assurance activities including validation, verification and technical reviews
5. Coaching and mentoring engineers while working collaboratively across multidisciplinary teams
Essential experience of the Modular Reactor Systems Engineering Lead:
6. Extensive experience across the full systems engineering lifecycle
7. Proven ability to lead, influence and make sound technical decisions in complex environments
8. Experience delivering engineering assurance, validation and verification activities
9. Background working in highly regulated industries, ideally nuclear or similarly regulated sectors
10. Experience engaging with multiple stakeholders across interdisciplinary engineering teams
Qualifications for the Modular Reactor Systems Engineering Lead:
11. Chartered Engineer status, or working towards this, or equivalent experience
12. Degree‑level qualification in engineering or a relevant technical discipline
13. Strong practical knowledge of systems engineering principles
14. Experience leading technical reviews and assurance activities
15. Ability to communicate complex technical information clearly and effectively
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
16. Generous holiday allowance
17. Matched contribution pension scheme, with life assurance
18. Access to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+
19. Employee share scheme
20. Employee shopping savings portal
21. Payment of Professional Fees
22. Reservists in the armed forces receive 10-days special paid leave
23. 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.
24. ‘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
25. Excellent development opportunities and benefits package including an employee assistance programme supporting physical, mental and financial wellbeing.
Cavendish
We’re Cavendish Nuclear — a team of c5, specialists and a core part of