Mechanical Design Engineer - Submarines

• Job Title: Mechanical Design Engineer - Submarines

We are seeking an experienced Mechanical design engineer with expertise in Heating, Ventilation, Air Conditioning (HVAC) and Building Services to join the Infrastructure Design Authority, acting as the Intelligent Customer and SME for all aspects related to HVAC systems and Building Services/Utilities.

Rolls-Royce is one of the most enduring and iconic brands in the world and has been at the forefront of innovation for over a century. We design, build and service systems that provide critical power to customers where safety and reliability are paramount.

We are proud to be a force for progress, powering, protecting and connecting people everywhere.

We want to ensure that the excellence and ingenuity that has shaped our history continues into our future and we need people like you to come and join us on this journey.

We'll provide an environment of caring and belonging where you can be yourself. An inclusive, innovative culture that invests in you, gives you access to an incredible breadth and depth of opportunities where you can grow your career and make a difference.

We offer excellent development opportunities, a competitive salary, and exceptional benefits. These include bonus, employee support assistance and employee discounts.

With this exciting opportunity you will be carrying out following key tasks:

• Ensure the design intent for HVAC and Building Services Infrastructure is preserved throughout each asset's lifecycle.
• Confirm appropriate, current design standards are established and adhered to for HVAC and Building Services Infrastructure operated by RRSL.
• Deliver design, modification, and build assurance in support of the relevant Rolls Royce Design Authorities.
• Oversee and assure the safe operation, inspection, and maintenance of RRSL's HVAC and Building Services Infrastructure.
• Take responsibility for approving and assuring significant changes to infrastructure operated by RRSL.

To be successful in this role you will need to be:

• Experienced in the design, construction, and operation of regulated and conventional infrastructure within the UK.
• Knowledgeable about current Euro Codes, British Standards, Codes of Practice, and relevant Guidance Documents.
• Familiarity with the Nuclear sector and its working practices is desirable.
• Able to apply a pragmatic, risk based approach, supported by strong technical capability, problem solving skills, and sound decision making.
• A degree qualified Chartered Engineer registered with a relevant professional body, such as the Chartered Institution of Building Services Engineers (CIBSE) or the Institution of Mechanical Engineers (IMechE). Desirable

We're an equal opportunities employer. We're committed to developing a diverse workforce and an inclusive working environment. We believe that people from different backgrounds and cultures give us different perspectives. And the more perspectives we have, the more successful we'll be. By building a culture of respect and appreciation, we give everyone who works here the opportunity to realise their full potential.

you can learn more about our global inclusion strategy at

To work for the Rolls Royce Submarines Business an individual has to hold a Security Check (SC) clearance without any caveats to that clearance. Rolls Royce will support the application for Security Clearance if the individual does not currently already have this in place.

Due to the nature of work the Business conducts and the protection of certain assets a person has to be a UK national or in MoD approved cases a Dual National from a non ITAR

As part of our selection process, candidates in certain locations may be asked to complete an online assessment, which can include cognitive and behavioural aptitude testing relevant to the role. If required, full instructions for the next steps will be provided.

Group Property

27 Nov 2025; 00:11