Let’s find your next opportunity​

{{ job.job_posting_title }}
{{item.trim() }} {{item.trim() }} {{item.trim() }}
{{ job.job_posting_title }}

{{ job.is_cms_job ? (job.cities.split(';').length > 1 ? 'Various locations' : job.location_mappings[0]) : (job.location_mappings.length > 1 ? 'Various locations' : job.location_mappings[0]) }}

saved
viewed

Senior / Principal Mechanical Building Services Engineer

Cardiff, Wales, United Kingdom

Overview

Shape the future of our cities and environments

You might know us for the great work we do across our wide variety of projects. We're proud to say it's thanks to our people's diversity of thought, expertise and knowledge. And when you join us, you'll be a part of this genuinely collaborative environment, where everyone's voice is valued and treated equally.

We're passionate about what we do, but we don't take ourselves too seriously. Simply put, this a great place to be. So, when it comes to your life outside of work, ask us about our flexible and remote working policies designed to help you get the most out of life.

Your role

  • Take responsibility for understanding client requirements through clear briefings and effective stakeholder management, ensuring strong and trusted working relationships.
  • Prepare mechanical specifications and equipment schedules with attention to detail and alignment to project needs.
  • Carry out accurate heating, cooling, and ventilation calculations to support safe, efficient, and compliant designs.
  • Produce detailed technical calculations using industry‑standard digital tools, while also supporting and guiding others in producing high‑quality outputs.
  • Collaborate closely with the AtkinsRéalis Global Technology Centre (GTC) to enhance design quality and add value to building services projects.
  • Confidently represent AtkinsRéalis in meetings with clients, contractors, and project partners, contributing positively and professionally.
  • Undertake site surveys and regularly review site progress to ensure designs are delivered as intended.
  • Manage project delivery responsibilities, supporting projects through key stages to successful completion.
  • Actively contribute to the growth of the team by assisting in the development and mentoring of colleagues.
  • Take advantage of opportunities to step into a lead role within the Mechanical Design Delivery team.
  • Benefit from clear opportunities for career progression and professional development within the organisation.
Engineering

Location

Cardiff, Wales, United Kingdom

Job Type

Full time

Ref

R-154468

Salary range

-

Dwithi M

[email protected]

Dwithi M

Hi there, I'm Dwithi M and I manage this role

Message me

About you

  • Degree qualified, or equivalent qualification, in Building Services Engineering or related subject.
  • Chartered Engineer with CIBSE / IMechE or working towards chartership.
  • Good level of computer literacy in Microsoft packages.
  • Experience and awareness of mechanical design tool software packages such as IES, HEVACOMP, NBS and Revit.
  • CIBSE Low Carbon Consultant (LCC).
  • Experience working in a design consultancy and/or experience of working within a contractor design environment is essential.
  • Have a detailed knowledge of appropriate technical standards.
  • Able to take charge of project deliverables, make decisions, act on own initiative and operate in a pro-active way.
  • Awareness and management of available project budget.
Why choose AtkinsRéalis?

Why choose AtkinsRéalis?

Wherever you are in your career – and whoever you are – AtkinsRéalis is for you. Here, support and collaboration are a vibrant part of a culture that lets you choose where – and how far – your career can go. Take on projects that push boundaries and drive sustainable impact, surrounded by colleagues who believe there's no limit to how brilliant you can be. It's time to join a like-minded team where you'll be rewarded, supported, and free to be your kind of brilliant.

Rewards & benefits

Explore the rewards and benefits that help you thrive – at every stage of your life and your career. Enjoy competitive salaries, employee rewards and a brilliant range of benefits you can tailor to suit your own health, wellbeing, financial and lifestyle choices. Make the most of a myriad of opportunities for training and professional development to grow your skills and expertise. And combine our hybrid working culture and flexible holiday allowances to balance a great job and fulfilling personal life.

Be rewarded. Find out more.

video thumbnail

Make it brilliant, a career with AtkinsRéalis

Our supportive, collaborative culture inspires us as a global community every day.

Watch this short film and imagine what you could achieve here, too.

About AtkinsRéalis

About AtkinsRéalis

We're AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world's'infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We're committed to leading our clients across our various end markets to engineer a better future for our planet and its people.

Find out more.

Additional information

Security clearance

This role may require security clearance and offers of employment will be dependent on obtaining the relevant level of clearance. If this is necessary, it will be discussed with you at interview. The vetting process is delivered by United Kingdom Security Vetting (UKSV) and may require candidates to provide proof of residency in the UK of 5 years or longer. If applying to this role please do not make reference to (in conversation) or include in your application or CV, details of any current or previously held security clearance.

We are committed to creating a culture where everyone feels that they belong - a place where we can all be ourselves, thrive and develop to be the best we can be. So, we offer a range of family friendly, inclusive employment policies, flexible working arrangements and employee resource groups to support all employees. As an Equal Opportunities Employer, we value applications from all backgrounds, cultures and ability. As a Disability Confident Leader, we are committed to offering an interview to all applicants who have a disability and meet the essential criteria. If you would like to be considered under this commitment, please let us know at the application stage.

#LI-INFRASTRUCTURE | #LI-UK

Related jobs

Planning Engineer
Project, programme & cost management Risk Management & Project Controls Full time
Planning Engineer

Doha, Ad Dawhah, Qatar

Mechanical Inspector
Project, programme & cost management Engineering Full time
Mechanical Inspector

Doha, Ad Dawhah, Qatar

Senior Electrical Engineer (Buildings)
Cities & development Engineering Full time
Senior Electrical Engineer (Buildings)

Bedford, Nova Scotia, Canada

Structural Engineer
Cities & development Engineering Full time
Structural Engineer

Winnipeg, Manitoba, Canada

Structural BIM Technician
Cities & development Engineering Full time
Structural BIM Technician

Toronto, Ontario, Canada

Structural Engineer
Cities & development Engineering Full time
Structural Engineer

Vancouver, British Columbia, Canada

Fire Protection Engineer
Cities & development Engineering Full time
Fire Protection Engineer

Various locations

Code Consultant – Fire Protection
Cities & development Engineering Full time
Code Consultant – Fire Protection

Various locations

Team Lead - Fire Protection
Cities & development Engineering Full time
Team Lead - Fire Protection

Ottawa, Ontario, Canada

Fire Protection Project Manager
Cities & development Project & Programme Management Full time
Fire Protection Project Manager

Various locations

Fire Protection Technologist
Cities & development Engineering Full time
Fire Protection Technologist

Various locations

Electrical Engineer - Airfield Lighting
Cities & development Engineering Full time
Electrical Engineer - Airfield Lighting

Toronto, Ontario, Canada

Related blogs

The lessons 23 years in engineering will teach you: Suraya Dolah’s story

Meet Suraya Dolah and read about her 23 year journey in engineering shaped by passion, resilience, and impact.

Card link for The lessons 23 years in engineering will teach you: Suraya Dolah’s story

Chen Zhou on building better transit systems

Connecting people, operations, and infrastructure is what make transit work.

Card link for Chen Zhou on building better transit systems

Not your typical engineering career: Danielle’s story across borders

Read how Danielle Lim‑Kwan built a truly global engineering career.

Card link for Not your typical engineering career: Danielle’s story across borders
Sindhu smiling

The confidence to explore, the courage to innovate, and the opportunity to grow: Sindhu's journey at AtkinsRéalis.

Sindhu joined AtkinsRéalis through the India Graduate Development Programme in 2020. Five years later, her journey reflects the power of curiosity, innovation, and a willingness to step beyond her comfort zone.

Card link for The confidence to explore, the courage to innovate, and the opportunity to grow: Sindhu's journey at AtkinsRéalis.
Headshot of Emma

International women in engineering day: from first step to leadership

Sometimes the biggest career shifts come from the smallest moments. For me, it started with a desk move that opened the door to something entirely new.

Card link for International women in engineering day: from first step to leadership

Powering major infrastructure: Paul on leading electrical engineering in British Columbia

I’m the Manager of Electrical Engineering for British Columbia at AtkinsRéalis, where I lead our Vancouver electrical team and support the delivery of complex infrastructure projects.

Card link for Powering major infrastructure: Paul on leading electrical engineering in British Columbia

From India to South Korea: building a career in HSE on one of Asia’s biggest pet food expansions

Meet Ashish, and read about what it takes to lead HSE on a major construction project and why he’s invested his career in helping a multinational organisation operate safely.

Card link for From India to South Korea: building a career in HSE on one of Asia’s biggest pet food expansions
Smita in Blue dress

From delivery to legacy: Smita on engineering what matters

From project delivery to quality leadership, Smita's journey has been guided by a simple belief: great engineering is not just about what we build, but the impact it leaves behind.

Card link for From delivery to legacy: Smita on engineering what matters

What early careers really look like in engineering: Teresa Chan’s journey

Discover how Teresa Chan is building her engineering career at AtkinsRéalis — learning through collaboration, support, and real-world project experience.

Card link for What early careers really look like in engineering: Teresa Chan’s journey