Mechanical Building Services Engineer

Job Title: Mechanical Building Services Engineer

Location: Plymouth, Devon

Compensation: £45,692 + Benefits

Role Type: Full time / Permanent

Role ID: SF71811

Shape the Future of Engineering at the Heart of UK Defence

Applies Engineering concepts and theories to deliver the development of designs, calculations and technical solutions for Babcock products and services across the Engineering Product Lifecycle. Works independently with occasional supervision, seeking guidance for complex situations. Develops learning, skills and experience within discipline/domain. Provides mentoring to others.

As a Mechanical Building Services Engineer, you'll play a critical role in supporting major engineering and infrastructure programmes within one of the UK's most important defence sites.

Day-to-day, you'll provide technical engineering expertise across the full lifecycle of building services systems, from requirements capture and concept development to through life support and decommissioning.

• Develop and deliver designs across all stages of the engineering design process, ensuring compliance with relevant legislation and standards.
• Lead or contribute to engineering tasks, organise workloads, and facilitate progress within a multidisciplinary team.
• Produce detailed design documentation, assessments, and technical reports, acting as lead author where appropriate.
• Provide expert advice on maintaining design intent, ensuring adherence to design codes, safety regulations, and statutory requirements.
• Represent the Mechanical Building Services Technical Authority through onsite system surveys, reviews, and through life technical support activities.

This role is full time, 35 hours per week and is based on site at Devonport Royal Dockyard.

• Strong foundation in mechanical engineering principles relating to systems such as steam and condensate, industrial gases, fresh and demineralised water, HVAC, and domestic water services.
• Proficiency in digital tools, engineering software, and documentation platforms.
• Knowledge of the engineering design lifecycle and its application within complex projects.
• Understanding of relevant regulations, legislation, and technical standards for building services design.
• Experience working within nuclear or other high hazard industries.

• Level 5 qualification in mechanical engineering or building services or a Level 4 qualification with substantial relevant experience.
• Higher level qualifications, membership of professional engineering institutions, or specialist building services certifications - Desirable.

The successful candidate must be able to achieve and maintain Security Check (SC) security clearance for this role.

Many of the positions within our company are subject to national security clearance and Trade Control restrictions. This means that your eligibility for certain roles may be affected by your place of birth, nationality, current or former citizenship, and any residency you hold or have held. Further details are available at United Kingdom Security Vetting: clearance levels - GOV.UK ().

• Generous holiday allowance
• Matched contribution pension scheme, with life assurance
• Access to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+
• Employee shopping savings portal
• Payment of Professional Fees
• Reservists in the armed forces receive 10 days special paid leave
• Holiday Trading is a benefit that allows UK Babcock employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement. This Window opens February through to March annually.
• 'Be Kind Day' enables employees to take one working day's paid leave a year (or equivalent hours) to undertake volunteering work with their chosen organisation or registered charity.

We're Babcock - a global FTSE 100 organisation with over 26,000 people working together to make a difference.

Here, you'll be part of something bigger. From initial design to final decommissioning, your work will contribute to products and services that are essential to national security and public infrastructure. Together, we're building a future that lasts - not just through the impact we make, but through meaningful careers that respect your work life balance.

We call that lifetime engineering.

Join us and see how far we can go, together.

We are a disability confident committed employer. If you have a disability or need any reasonable adjustments during the application and selection stages, please email with the subject header 'Reasonable adjustments requirement'. We're committed to building an inclusive culture where everyone's free to thrive. We are happy to talk about flexible working - please ask about alternative patterns of work at interview.

Closing date: 19/03/2026