Principal Mechanical Building Services Engineer
Listed on 2026-10-16
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Engineering
Mechanical Engineer, Environmental Engineer, Energy Engineer, Electrical Engineering
Location/s:
Glasgow, Altrincham, Bristol, Southampton, Tadley, London; UK
Mott Mac Donald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.
We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.
Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you’re surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued.
Whatever your ambition, Mott Mac Donald is where people come to be brilliant.
The Energy unit delivers services to clients globally across several sectors including hydropower, nuclear, waste, renewable generation and transmission & distribution networks. Together we provide integrated engineering and project management services across the project lifecycle – from concept and design to construction and operations, to decommissioning or repowering and life extension. Together with our clients, we’re helping to deliver the energy transition globally.
Due to new project wins and continued growth, we are recruiting Mechanical Building Services Engineers to join our teams across the UK. You’ll have the opportunity to work on some of the most exciting projects in the industry, there’s never been a better time to join us!
Overview of the roleWe’re looking for Principal Building Services Engineers to join our Nuclear, Defence and Civil division. This role offers an exciting opportunity to help shape the future of innovative projects across the defence, nuclear pharmacology research and nuclear new-build industries. It combines technical leadership with strategic project responsibilities. As part of our growing team, you will contribute to solutions for high-profile engineering challenges while developing your career within an organisation committed to supporting your professional growth.
We know there’s no such thing as the ‘perfect’ candidate. If you meet around 75% of the criteria below, we’d love to hear from you.
Key responsibilities and duties include:- Lead building services aspects of multi-discipline design projects, from feasibility to detailed design stages, on some of the most interesting and challenging nuclear projects
- Manage and review design drawings, layouts, and schematics, including heating, ventilation, LTHW, chilled water, specialist LEV, and BMS installations
- Review and check / approve design calculations
- Oversee and approve documentation such as assessment/condition reports, survey reports, basis of designs, and procurement specifications
- Guide the delivery of high-quality written work, including functional specifications, basis of design, equipment specifications, and validation and verification plans
- Take responsibility for ensuring compliance with construction (design and management) regulations across multiple projects
- Lead building services aspects in the preparation of bids and project estimates, including equipment and man-hour costs and developing innovative solutions to complex challenges
- Drive project delivery, including resource planning, client engagement, and coordination of technical input
- Manage and mentor multidisciplinary engineering teams to support…
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