Join Us as a Principal Mechanical Design Engineer!
Location: Barrow-in-Furness. Enjoy the flexibility of hybrid working arrangements—let's discuss the options that suit you best!
Salary: Circa £55,000
Your Mission:
As a Principal Mechanical Design Engineer, you will:
* Lead the development of complex fluid systems, crafting designs that excel in performance and environmental standards.
* Create and review high-value engineering deliverables, from schematics and P&IDs to calculations, system descriptions, and 3D models.
* Drive advanced system analyses, including flow, pressure, thermal, and transient modelling to validate performance under challenging conditions.
* Select and assess critical equipment (pumps, compressors, valves, heat exchangers, filters, tanks) to ensure they thrive in tough submarine environments.
* Champion technology integrity by reviewing supplier documentation, ensuring compliance with shock, vibration, atmosphere, temperature, maintainability, and access constraints.
* Influence design quality and safety through reviews, hazard studies, verification activities, and resolving technical issues.
Your Skills and Experiences:
Essential:
* Degree-level education, with Chartered Engineer status highly desirable.
* Strong background in mechanical, marine, process, or fluid systems engineering within a complex or highly regulated environment.
* In-depth knowledge of fluid dynamics, thermodynamics, pressure-drop behaviour, transient analysis, and system performance modelling.
* Proven technical expertise in the design, analysis, and integration of compressible and incompressible fluid systems.
Desirable:
* Experience with industry-standard modelling and analysis tools such as FloMASTER, FluidFlow, MATLAB, CFD packages, ANSYS, or similar.
What We Offer:
In addition to a competitive pension scheme, BAE Systems provides:
* Employee share plans
* An extensive range of flexible health, wellbeing, and lifestyle benefits, including a green car scheme and private health plans
* Shopping discounts
* Potential eligibility for an annual incentive
About the Mechanical Engineering Discipline Team:
This is your chance to join the SSN AUKUS Platform Mechanical Integrated Delivery Team as a Principal Mechanical Design Engineer. You will be a technical specialist for some of the submarine’s most critical fluid systems, taking ownership of high-integrity mechanical designs that must perform flawlessly in one of the most demanding engineering environments. You’ll shape complex system solutions, influence platform-level decisions, and ensure designs meet rigorous performance, safety, and environmental requirements unique to submarine engineering. This role places you at the forefront of next-generation naval capability, tackling challenging technical problems and contributing directly to one of the UK’s most advanced defence programmes. Relocation support is available for eligible candidates.
Why Choose BAE Systems?
At BAE Systems, you’ll make a real difference in an inclusive culture that values diversity of thought and rewards integrity and merit. We empower you to reach your full potential and welcome individuals from all backgrounds. If you have a disability or health condition that may affect your performance in certain assessments, we encourage you to discuss potential reasonable adjustments with your recruiter.
Important Note: Many roles at BAE Systems are subject to security and export control restrictions. Factors such as nationality, previous nationalities, and place of birth may affect your eligibility for certain roles. All applicants must achieve at least 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!
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