Principal Mechanical Design Engineer (Millom)

Location: Barrow-in-Furness. Enjoy the flexibility of hybrid working arrangements—talk to your recruiter about the options available for this role!

Salary: Circa £55,000

As a Principal Mechanical Design Engineer, you will be at the forefront of innovation, leading the development of complex fluid systems that meet rigorous performance and environmental standards. Here’s what you’ll be doing:

• Lead the end-to-end development of intricate fluid systems.
• Create and review high-value engineering deliverables, from schematics and P&IDs to calculations, system descriptions, and 3D models.
• Drive advanced system analyses to validate performance under challenging conditions.
• Select and assess critical equipment, ensuring it meets tough submarine operating environments.
• Champion technology integrity by reviewing supplier documentation for compliance with various constraints.
• Influence design quality and safety through reviews, hazard studies, and resolution of technical issues.

Essential:

• Degree-level education, with Chartered Engineer status highly desirable.
• Solid background in mechanical, marine, process, or fluid systems engineering within a complex or highly regulated environment.
• Strong knowledge of fluid dynamics, thermodynamics, and system performance modelling.
• Demonstrated technical expertise in the design and integration of fluid systems.

Desirable:

• Experience with industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar.

At BAE Systems, we offer more than just a job; we provide a platform for you to make a real difference. Here’s what you can expect:

• A competitive pension scheme and employee share plans.
• An extensive range of flexible health, wellbeing, and lifestyle benefits, including a green car scheme and private health plans.
• Opportunities for growth and development in a supportive environment.

Join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer. You’ll take ownership of high-integrity mechanical designs that must perform flawlessly in one of the most demanding engineering environments. This is your chance to tackle challenging technical problems and contribute to one of the UK’s most advanced defence programmes.

We believe in an inclusive culture that values diversity of thought and empowers you to fulfil your potential. If you have a disability or health condition that may affect your performance, we encourage you to discuss potential reasonable adjustments with your recruiter.

Please note that many roles at BAE Systems are subject to security and export control restrictions. Factors such as nationality and residency may affect your eligibility for certain roles. All applicants must achieve the Baseline Personnel Security Standard, with many roles requiring higher levels of National Security Vetting.

Closing Date: 13th February 2026

We may close this vacancy early if we receive sufficient applications, so don’t wait—submit your application as soon as possible!

#LI-MS1