Principal Mechanical Engineer
Location: Bristol or Warrington, Cheshire
Compensation: Competitive Salary + Benefits
Role Type: Full time / Permanent
Drive Innovation in Defence Nuclear Engineering
At Cavendish Nuclear we’re working to create a safe and secure world, together, and if you join us, you can play your part as a Principal Mechanical Engineer at one of our key locations: Warrington (Cheshire) or Bristol.
The role
As a Principal Mechanical Engineer, you’ll have a role that’s out of the ordinary. This role will contribute to a high-impact public sector Defence Nuclear infrastructure initiative focused on enhancing operational resilience and sustainability across critical systems. The project involves complex mechanical systems integration, requiring innovative engineering solutions within a multidisciplinary team.
Day-to-day, you’ll lead multidisciplinary engineering teams, oversee the delivery of complex technical solutions, and act as a key point of contact for customers, ensuring high standards of safety, quality, and performance while mentoring others and driving continuous improvement across projects.
- Lead and manage 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 the 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.
This role is full time, 37 hours per week and provides hybrid working arrangements with 3 days in the office/onsite, at one of our key locations: Warrington (Cheshire) or Bristol.
Essential experience of the Principal Mechanical Engineer
- 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 for the Principal Mechanical Engineer
- 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. Further details are available at United Kingdom Security Vetting: clearance levels – GOV.UK (www.gov.uk).
What we offer
- Generous holiday allowance
- Matched contribution pension scheme, with life assurance
- Access to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+
- Employee share scheme
- Employee shopping savings portal
- Payment of Professional Fees
- Reservists in the armed forces receive 10-days special paid leave
- Holiday Trading allows employees to buy additional leave or sell up to one working week of annual leave. This window opens February through to March annually.
- ‘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
- Excellent development opportunities and benefits package including an employee assistance programme supporting physical, mental and financial wellbeing.
We are a disability confident committed employer. If you have a disability or need any reasonable adjustments during the application and selection stages, please email careers@babcockinternational.com with the subject header ‘Reasonable adjustments requirement’. We’re committed to building an inclusive culture where everyone’s free to thrive. We are happy to talk about flexible working – please ask about alternative patterns of work at interview.
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