Principal Mechanical Engineer

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.

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.

• Extensive experience leading multidisciplinary engineering teams and delivering complex technical projects within agreed scope, time frames, 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.

• Engineering degree (or equivalent qualification) in a relevant engineering discipline, with significant demonstrable experience.

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 -  ().

• Generous holiday allowance
• Matched contribution pension scheme, with life assurance
• Access to a Digital GP, annual health check, and nutritional consultations through Aviva Digi Care+
• 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…