Senior Mechanical Commissioning Engineer

Job Title:                    Senior Mechanical Commissioning Engineer

Location:                    Plymouth, Devon + Hybrid Working Arrangements

Compensation:          Attractive Salary + Benefits

Role Type:                  Full time / Permanent

Role ID:                      SF72861

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 Senior Mechanical Commissioning Engineer at our Plymouth, Devon site.

The role

As a Senior Mechanical Commissioning Engineer, you’ll have a role that’s out of the ordinary. You will play a pivotal role in delivering submarine maintenance programmes that are critical to the United Kingdom’s defence capability. Acting as a subject matter expert, you will provide technical leadership, assurance, and guidance across complex mechanical commissioning activities, ensuring work is delivered safely, compliantly, and to the highest professional engineering standards.

Day-to-day, you’ll be required to:

• Lead and coordinate mechanical commissioning activities across submarine maintenance periods
• Provide technical assurance through inspections, testing, and commissioning against design intent and specifications
• Engage with stakeholders, representing Babcock at meetings with the Ministry of Defence and relevant authorities
• Manage commissioning risk, contributing to risk registers and mitigation planning
• Ensure compliance with professional engineering standards, quality requirements, and nuclear and submarine safety constraints.

This is a full‑time role, working 35 hours per week, Monday to Friday, based in Plymouth, Devon. Hybrid working patterns are available under local agreement.

Essential experience of the Senior Mechanical Commissioning Engineer:

• Extensive commissioning experience across submarine or complex marine maintenance programmes
• Strong background in submarine or ship operations or refit environments
• Proven ability to work confidently across multidisciplinary teams and stakeholder groups
• Excellent written and verbal communication skills
• Ability to adapt, prioritise, and lead effectively in dynamic, operational environments

Qualifications for the Senior Mechanical Commissioning Engineer:

• HNC in a mechanical engineering discipline or equivalent relevant experience
• Additional engineering or professional qualifications are advantageous.

Security Clearance

The successful candidate must be a sole UK National who is able to achieve and Security Check (SC) and Naval Nuclear Propulsion Information (NNPPI) security clearance for this role.

Many of the positions within our company are subject to national security clearance and Trade Control restrictions. This means that your eligibility for certain roles may be affected by your place of birth, nationality, current or former citizenship, and any residency you hold or have held. 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 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. There is an annual Window to request this benefit. ‘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

We’re Babcock — 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 call that lifetime engineering.

Join us and see how far we can go, together.

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.

Closing date: 23/04/2026

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