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Senior Building Services Engineer

Job in Belfast, County Antrim, BT1, Northern Ireland, UK
Listing for: Mott MacDonald
Full Time position
Listed on 2026-08-08
Job specializations:
  • Engineering
    Mechanical Engineer, Civil Engineering, Electrical Engineering
Job Description & How to Apply Below

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
.

About the business unit

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!

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 inception to 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.

About

this role

We’re looking for Senior 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. 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.

What you will do:
  • Contribute to some of the most interesting and challenging nuclear projects
  • Produce detailed design calculations to support design requirements
  • Producing documentation, assessment/condition reports, survey reports, basis of designs, procurement specifications, etc.
  • Production and review of detailed design calculations to support design proposals
  • Production and review of detailed design drawings, layouts and schematics including heating, ventilation, LTHW, Chilled Water, specialist LEV and BMS installations
  • Producing estimates of work elements including equipment and man hour costs
  • Supporting the preparation of bids and estimates
  • Ensure compliance with construction (design and management) regulations
  • Mentoring and guidance of junior staff
What you will bring:
  • Degree in Building Services, Mechanical Engineering, Process Engineering or equivalent
  • Chartered status with the IMechE or other relevant professional body
  • Experience in the delivery of written work, e.g. functional Specifications, Basis of Design, Equipment Specifications and Validation and Verification plans
  • Experience with in a highly regulated environment (such as Health and Life Sciences, Oil & Gas, Pharmaceutical or Rail experience)
  • Broad knowledge of industry standards, legislation, and engineering principles, including knowledge of CIBSE guidelines and standards
  • Experience of using design software
  • Revit and AutoCAD knowledge and experience will be beneficial
  • Initiative and self-motivation to make decisions
  • Good verbal and written communication skills

This role offers the opportunity to work at the forefront of the Nuclear Building Services working within multidisciplinary teams, delivering impactful projects for some of the industry’s most prominent clients.

D…

Position Requirements
10+ Years work experience
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