Job Description

Job Title: Senior Mechanical Building Services Engineer
Location: Glasgow + Hybrid Working Arrangement
Compensation: Competitive + Benefits
Role Type: Full time / Permanent
Role ID: SF59055
At Cavendish Nuclear we're working to create a safe and secure world, together, and if you join us, you can play your part as a Senior Mechanical Building Services Engineer at our Glasgow site.
The role
As a Senior Mechanical Building Services Engineer, you'll have a role that's out of the ordinary. This opportunity will involve working as part of a JV team on the Nuclear Technical Support Provider (NTSP) framework. This seven-year framework, with the option of a further three years, will deliver specialist nuclear technical services valued between 250-million to 400-million to support DIO, Navy Command and other MOD organisations.
The framework will support the Clyde Infrastructure Programme (CIP) and wider Royal Navy and defence requirements. Its primary focus will be on delivering the refurbishment and upgrade of critical infrastructure at HMNB Clyde.
Day-to-day, you'll lead the design and delivery of mechanical building services systems, such as HVAC, water, drainage, and fire protection-for nuclear facilities. You'll oversee technical documentation, guide CAD modelling, ensure compliance with safety and regulatory standards, mentor junior engineers, and engage with stakeholders to deliver integrated and innovative solutions.
Key Accountabilities:

• Lead the design of mechanical building services systems, ensuring alignment with nuclear safety cases, operational requirements, and environmental control needs.
• Collaborate with multidisciplinary teams to integrate mechanical systems with electrical, structural, and safety engineering disciplines.
• Ensure all engineering activities comply with relevant standards and codes (e.g. CIBSE, BS EN, ASHRAE) and nuclear-specific procedures.
• Oversee the production and review of technical deliverables, including schematics, calculations, equipment schedules, and CAD/Revit models.
• Support stakeholder engagement and project planning, resolving technical challenges and maintaining design integrity throughout the project lifecycle.

Essential experience of the Senior Mechanical Building Services Engineer

• Proven ability to work collaboratively within multi-disciplinary teams to deliver engineering solutions across a variety of project types.
• Demonstrated experience in managing a diverse range of engineering tasks, from straightforward to highly complex challenges.
• Strong communication skills with the ability to effectively interface with colleagues across disciplines, clients, and stakeholders.

Qualifications for the Senior Mechanical Building Services Engineer

• Degree qualified, or equivalent qualification

Security Clearance
The successful candidate must be able to achieve and maintain Standard (BPSS) / Security Check (SC) security clearance for this role. Further details are available at
What we offer

• 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 share scheme
• 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 Cavendish Nuclear 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

Cavendish Nuclear
As a leader within the UK nuclear industry, Cavendish Nuclear, part of Babcock International Group, provides a comprehensive range of critical nuclear solutions in clean energy, defence and civil new build and decommissioning projects. Together, we're innovating to make nuclear safer, faster and cost-effective across the nuclear energy life cycle. Your career with us could take you anywhere within Babcock International Group - from Canada, the USA to Japan. Work with us to create a safe and secure world, 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 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.
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Skills Required