Principal Mechanical Engineer

Overview

Join to apply for the Principal Mechanical Engineer role at Babcock International Group

Location:

Flexible, UK + Hybrid Working Arrangement

Contract:

Full time / Permanent

Role

Lead the Way in Nuclear Decommissioning

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), Leicester (Leicestershire), or Preston (Lancashire).

As a Principal Mechanical Engineer, you’ll play a pivotal role in a major civil nuclear decommissioning initiative. This project is part of a broader effort to safely dismantle and remediate legacy nuclear infrastructure, with a strong emphasis on sustainability, regulatory compliance, and environmental stewardship. You’ll be working on the integration of complex mechanical systems within a multidisciplinary team, developing innovative engineering solutions to support the safe deconstruction and long-term management of nuclear facilities.

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 with hybrid working arrangements (3 days in the office) at one of our key locations:
Warrington (Cheshire), Leicester (Leicestershire), or Preston (Lancashire).

Although nuclear experience is not essential and we welcome applicants from all highly regulated industries.

• 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 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 and Be Kind Day benefits
• Excellent development opportunities and wellbeing programs

As a leader within the UK nuclear industry, Cavendish Nuclear, part of Babcock International Group, provides a comprehensive…