Job Description
Principal Mechanical Engineer – Cavendish Nuclear (UK)
Location
Flexible, UK – Hybrid Working Arrangement (3 days on site at Warrington, Bristol, Newbury or Preston)
Compensation
Competitive salary + benefits (see benefits section below)
Role Type
Full time / Permanent
Role ID
SF66879
Drive Innovation in Defence Nuclear Engineering
At Cavendish Nuclear we’re creating a safe and secure world. As a Principal Mechanical Engineer you will lead multidisciplinary engineering teams on a high‑impact public sector Defence Nuclear infrastructure initiative. The role involves complex mechanical systems integration, innovative engineering solutions, and continuous improvement across projects.
The role
Day‑to‑day responsibilities include leading engineering teams, overseeing delivery of complex technical solutions, acting as a key customer contact, and mentoring others. You will champion safety, quality and performance standards while driving continuous improvement.
* Lead multidisciplinary engineering teams to deliver high‑quality technical solutions aligned with customer requirements and project scope.
* Supervise and mentor engineers and technical specialists, ensuring effective performance, development, and adherence to engineering standards.
* Act as a key liaison with customers, fostering strong relationships and ensuring transparent communication on technical progress and delivery.
* Oversee production, review and approval of engineering outputs, including calculations, specifications and reports, ensuring compliance with relevant codes and standards.
* Champion health, safety and environmental standards across engineering activities, promoting a culture of best practice and continuous improvement.
Essential experience
* Extensive experience leading multidisciplinary engineering teams and delivering complex technical projects within agreed scope, timeframes, and quality standards.
* Proven ability to supervise and mentor engineers and technical specialists, fostering professional development and ensuring high performance.
* Strong background in producing, reviewing and approving detailed engineering outputs, including calculations, specifications and technical reports.
* Demonstrated expertise in applying relevant procedures, codes and standards to ensure compliance and technical integrity across engineering activities.
* Track record of effective customer engagement, including managing relationships, resolving technical issues and supporting business development initiatives.
Qualifications
* Engineering degree (or equivalent qualification) in a relevant engineering discipline, with significant demonstrable experience.
Security Clearance
The successful candidate must be able to achieve and maintain Standard (BPSS) / Security Check (SC) security clearance for this role.
What we offer
* Generous holiday allowance
* Matched contribution pension scheme, with life assurance
* Access to a Digital GP, annual health check and nutritional consultations via Aviva DigiCare+
* Employee share scheme
* Employee shopping savings portal
* Payment of professional fees
* Reservists receive 10‑day special paid leave
* Holiday trading – buy or sell up to one working week of annual leave (open February through March each year)
* 'Be Kind Day' – one paid day a year (or equivalent hours) to undertake volunteering work with your chosen charity
* Excellent development opportunities and wellbeing programmes, including an employee assistance programme
About Cavendish Nuclear
Part of Babcock International Group, Cavendish Nuclear delivers critical nuclear solutions across clean energy, defence and civil projects. We are committed to making nuclear safer, faster and cost‑effective. Your career could span roles across UK, Canada, USA and Japan.
We are an inclusive employer, committed to reasonable adjustments and flexible working. If you need any adjustments during the application or selection stages, please email careers@babcockinternational.com with the subject header 'Reasonable adjustments requirement'.
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