Principal Commissioning Engineer – Constructive

Company: Babcock Mission Critical Services España SA.
Apply for the Principal Commissioning Engineer – Constructive
Location: Plymouth
Job Description:

Principal Commissioning Engineer

Location: Devonport, Plymouth, GB, PL2 2BG

Onsite or Hybrid: OnSite

Job Title: Principal Commissioning Engineer

Role Type: Full time / Permanent

Role ID: SF71788

Overview

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 Commissioning Engineer – Constructive at our Devonport Royal Dockyard site.

The role

As a Principal Commissioning Engineer – Constructive, you’ll have a role that’s out of the ordinary. You’ll play a vital role in ensuring the safe testing, setting‑to‑work and commissioning of nuclear submarine systems. Working within our Naval Nuclear business, you’ll lead constructive and mechanical commissioning activities across multiple submarine projects, helping to return these vital national defence assets safely back into service.

Day‑to‑day, you’ll be responsible for ensuring systems are operated, controlled and commissioned in alignment with Nuclear Site Licence requirements, Ministry of Defence Authorisation Conditions and all relevant safety legislation.

  • Oversee the safe operation and control of mechanical plant and processes, ensuring full compliance with nuclear safety regulations and MOD Authorisation Conditions.
  • Prepare and authorise Test Documentation to meet project programme requirements, aligned with corporate standards.
  • Promote and uphold a strong safety culture, ensuring safety documentation and Safe Systems of Work are understood and executed effectively.
  • Provide day‑to‑day management of constructive staff and support the Manager of Trials to drive development and resource planning.
  • Lead and develop your commissioning section to deliver high‑quality testing, setting‑to‑work and commissioning activities to time, cost and quality standards.

This role is full time, 35 hours per week and is based on site at Devonport Royal Dockyard.

Essential experience

  • Substantial knowledge and experience of commissioning, operating and maintaining constructive/mechanical systems on nuclear submarines.
  • Strong understanding of Safe Systems of Work, safe release of systems and the Control of Work process.
  • Knowledge of relevant Licence Conditions, Operating Rules and Operating Instructions relating to nuclear commissioning.
  • Ability to manage multiple complex commissioning packages across several projects simultaneously.
  • Strong leadership, planning, organisational and communication skills, with the ability to work to a consistently high standard.

Qualifications

  • Level 4 qualification in an engineering discipline, or Level 3 qualification with significant commissioning operations experience.
  • Dockyard Nuclear Systems Course (or equivalent).
  • Additional professional development aligned to nuclear, mechanical or constructive engineering – Desirable.

Security Clearance

The successful candidate must be able to achieve and maintain Security Check (SC) security clearance for this role.

Benefits

  • Matched contribution pension scheme, with life assurance.
  • Access to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+.
  • Employee shopping savings portal.
  • Payment of Professional Fees.
  • Reservists in the armed forces receive 10‑days special paid leave.
  • Holiday Trading – allows UK Babcock employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement. This Window opens February through to March annually.
  • ‘Be Kind Day’ – allows 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.

Inclusive Employment

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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Posted: June 28th, 2026