Principal HVAC Design Engineer

Location: Barrow-in-Furness. Enjoy the flexibility of hybrid and flexible working arrangements—let's discuss what works best for you!

Salary: Circa £55,000

As a Principal HVAC Design Engineer, you will:

• Lead the development of cutting-edge HVAC systems that meet high performance, safety, and environmental standards.
• Create and review impactful engineering artifacts, including specifications, P&IDs, calculations, and 3D models.
• Drive advanced thermal, airflow, and pressure analyses to validate system performance in challenging conditions.
• Transform complex requirements into innovative and verifiable design solutions that set the benchmark for excellence.
• Guide engineers, suppliers, and design partners to shape best-in-class HVAC integration across the platform.
• Enhance design standards and evaluate specialist equipment, contributing to reviews, hazard assessments, and lifecycle verification.

We’re looking for someone with:

• Strong technical expertise in HVAC and mechanical system design, including psychometrics, thermal analysis, equipment specification, schematics, and system balancing.
• Proven experience in complex or regulated industries, familiar with standards like ISO 15138, BS EN 378, ASHRAE, or CIBSE.
• Skills in system performance assessment , design validation, modeling, and failure analysis.
• Awareness of multi-disciplinary system integration challenges across structures, electrical, controls, safety, and installation.
• Excellent communication skills to engage both internal and external stakeholders effectively.
• A STEM degree (or equivalent experience), ideally working toward or holding professional registration (CEng preferred).

We offer a competitive pension scheme along with:

• Employee share plans
• Flexible discounted health, wellbeing, and lifestyle benefits
• A green car scheme
• Private health plans
• Shopping discounts
• Potential eligibility for an annual incentive

In this role, you’ll be at the forefront of one of the UK’s most advanced engineering programs, leading the delivery of complex HVAC systems that shape the future of submarine platforms. You’ll take ownership of high-impact systems, provide trusted technical authority, and collaborate across multiple disciplines to bring innovative solutions to life.

Join a fast-moving, highly collaborative group of specialists pushing the boundaries of submarine engineering. This is a unique opportunity to work alongside experts from diverse backgrounds, contributing to mechanical capabilities that are critical to the success of the entire platform. We also offer relocation support across all Submarine roles, subject to eligibility criteria.

This is a place where you can truly make a difference. We foster an inclusive culture that values diversity of thought, rewards integrity, and empowers you to reach your full potential. We welcome individuals from all backgrounds and strive to make our recruitment processes as inclusive as possible. If you have a disability or health condition that may affect your performance in certain assessments, please discuss potential reasonable adjustments with us.

Important Note: Many roles at BAE Systems are subject to security and export control restrictions. Factors such as your nationality, any nationalities you may have previously held, and your place of birth can affect your eligibility for certain roles. All applicants must meet the Baseline Personnel Security Standard, with many roles requiring higher levels of National Security Vetting, typically necessitating 5 to 10 years of continuous residency in the UK.

Closing Date: 18th December 2025

We reserve the right to close this vacancy early if we receive sufficient applications. If you’re interested, we encourage you to apply as soon as possible!

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