Principal Mechanical Commissioning Engineer in Plymouth

At Babcock 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 Commissioning Engineer at our Devonport Royal Dockyard site.

The role involves:

• Leading the mechanical commissioning function across submarine maintenance programmes
• Managing the planning, enablement and delivery of commissioning activities and packages
• Producing commissioning documentation aligned with design authority and assurance requirements
• Providing expert technical advice to support maintenance planning and operational readiness
• Supporting continuous improvement, capability development and effective resource assurance

Please note that the successful candidate will be required to pass a targeted medical questionnaire and/or medical examination as a condition of employment for this role. This role is full time, 35 hours per week and is based on site at Devonport Royal Dockyard.

Essential Experience Of The Principal Mechanical Commissioning Engineer:

• Significant experience commissioning mechanical systems within a nuclear environment
• Demonstrable experience supporting submarine deep maintenance or comparable complex programmes
• Strong knowledge of safe systems of work, control of work and system release processes
• Proven ability to manage multiple complex commissioning activities across concurrent projects
• Experience leading teams and managing change in a live operational environment

Qualifications For The Principal Mechanical Commissioning Engineer:

• NVQ Level 4 or equivalent in an engineering discipline
• HNC or HND with substantial relevant engineering experience
• Higher or specialist engineering qualifications would be advantageous

Security Clearance: The successful candidate must be a sole UK National who is able to achieve and maintain Naval Nuclear Propulsion Information (NNPPI) 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 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 is a benefit that allows UK Babcock employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement.
• ‘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.

Babcock is a global FTSE 100 organisation with over 26,000 people working together to make a difference. Here, you’ll be part of something bigger. From initial design to final decommissioning, your work will contribute to products and services that are essential to national security and public infrastructure. Together, we’re building a future that lasts — not just through the impact we make, but through meaningful careers that respect your work-life balance.

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 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.

Closing date: 28/04/2026