Senior Commissioning Engineer – Mechanical

Job Title: Senior Commissioning Engineer – Mechanical (Propulsion)

Location: Barrow-In-Furness, Hybrid

We offer a range of hybrid and flexible working arrangements – please speak to your recruiter about the options for this particular role.

Salary: Competitive

Who We Are

Join BAE Systems and you’ll be part of something bigger. As a valued member of our global colleague network, you’ll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You’ll be trusted to play your part in delivering advanced, technology-led defence, aerospace and security solutions, shaping a safer future for all of us. From the depths of the ocean to the far reaches of space, there’s no limit to where a career at BAE Systems could take you.

What You Will Be Doing

In this role, you will support the commissioning, testing, and acceptance of propulsion mechanical systems aboard the Dreadnought Class submarines. Working within a highly regulated and safety-critical environment, you will ensure mechanical systems are installed, tested, and brought into service safely, compliantly, and in accordance with design requirements.

Core Duties

• Perform routine work with limited supervision & have an understanding of safety consequences in a high risk environment
• Liaise/Interface with relevant stakeholders i.e. Engineering, Royal Navy, MoD & Build Operations to ensure activities are undertaken in a safe & compliant manner
• Instruct & mentor less experienced members of the team within your knowledge & competency
• Responsible for researching, authoring & reviewing of design and test documentation to the required standard
• Keep full and accurate records of work activities carried out as required by policy, procedure & legislation
• Represent the Company on Factory Acceptance Tests and offsite test facilities, Contractors Sea Trials and other outworking requirements (with scope for Overseas travel)
• Responsible for delivering assigned activities in line with Company policy, procedures and legislation
  
  

Essential Skills

• Knowledge of mechanical system operation, ideally Steam and condensate systems, lubricating oil and cooling systems
• Experience with commissioning of complex heavy machinery plants e.g. diesels and turbo generators and steam turbine plants
• Knowledge of test equipment & activities required for specific tests
• Aware of Nuclear Site/Authorisation Conditions
• Understanding of Mechanical Flushing and Pressure & Endurance Testing and setting to work of systems
  
  

The Propulsion Mechanical Commissioning Team

You will be part of the team responsible for commissioning the secondary propulsion plant, on the first of class, next generation of Dreadnought submarines. The scope of the Dreadnought Programme is the delivery of four SSBNs to the Royal Navy to maintain Continuous At Sea Deterrence (CASD. We offer relocation support packages across all Submarines roles, subject to meeting eligibility criteria.

A Place Where Everyone Can Thrive

We’re committed to building an inclusive workplace where everyone feels valued and supported. We welcome applications from all suitably qualified people and encourage discussion of reasonable adjustments where needed.

Please be aware that many roles at BAE Systems are subject to security and export control restrictions. Applicants must meet Baseline Personnel Security Standard, and many roles require higher levels of National Security Vetting, including 5–10 years continuous UK residency depending on the role.

Why BAE Systems?

Here you’ll build a career with purpose and limitless possibilities. Lifelong learning, meaningful work, and a supportive culture enable you to grow with confidence. You’ll be recognised for your contribution and supported with rewards that matter most to you.

Closing Date: 2nd November 2026

We reserve the right to close this vacancy early if we receive sufficient applications. If you are interested, please apply as early as possible.