Mechanical Engineer

AtkinsRéalis is one of the worlds most respected design engineering and project management consultancies with over 50000 employees worldwide. We offer the opportunity to work on high-profile technically challenging projects that shape the built environment and support future generations. Drawing on a diverse skill set and a strong track record of delivery we play a leading role in complex engineering projects across sectors including Aviation Energy Cities and Development Education Transportation and Defence.

AtkinsRéalis Engineering and Design Practice is looking for a motivated Mechanical Building Services Engineer to join our team and further develop their career in a collaborative high-performing environment. We have openings in our London office offering the opportunity to join a national delivery team and work with designers across the UK and internationally through our Global Technology Centre. This opportunity involves working as part of a national practice of Building Design professionals delivering engineering design solutions to clients across the UK. The role offers exposure to a broad range of sectors with experience in Commercial Defence Energy Education and Healthcare particularly beneficial.

The role offers opportunities for client interaction while also being involved in the day-to-day design and delivery of projects. It is an excellent opportunity for an engineer to broaden their technical capability gain valuable project experience and develop client-facing skills within a leading building design consultancy. Our Building Services Engineering team won the Building Performance Consultancy (over 300 employees) award at the CIBSE Building Performance Awards 2025.

Our focus is on developing our people to realise their full potential with development plans tailored to individual needs and aspirations. This role offers the opportunity to build on existing technical strengths while developing digital capability project management skills and broader career progression within the practice supported by experienced colleagues across our national team.

Energy and carbon are central to this position and with the growing importance of decarbonising the built environment improving air quality and delivering energy-efficient design solutions our team is expanding to meet increasing client demand for sustainable high-performing buildings and future-ready engineering solutions.

Our Practice is committed to developing new ways of working through emerging digital technology and the global reach offered by an organisation of our scale and capability. Our ideal candidate will bring strong technical skills an enquiring mindset and the potential to contribute to the continued growth of our digital practice while developing broader project delivery and coordination skills within local and remote teams.

The role can be varied depending on projects and although not limited duties are likely to include:

• Undertake the design and specification of all mechanical building services systems from concept through to detailed design including heating cooling ventilation and public health systems.
• Carry out detailed calculations using industry-standard software tools including Excel IES Hevacomp and MEPworx.
• Prepare technical specifications design reports and presentations to support effective project delivery.
• Collaborate with our BIM team to develop models and drawings with a working understanding of Revit.
• Represent AtkinsRéalis at meetings with clients and other professionals.
• Carry out condition surveys inspections and support the monitoring of installation and commissioning activities.
• Manage your assigned workload and deliver work to a high standard within agreed deadlines and budgets.
• Contribute to knowledge sharing and support less experienced team members where appropriate.

• Relevant experience in Mechanical Building Services Engineering with a strong interest in design excellence and delivering high-quality sustainable building design solutions.
• A proactive and enquiring approach with an interest in exploring new ideas digital tools and ways of working that improve design quality and project outcomes.
• Degree qualified or equivalent qualification in Building Services Engineering / Mechanical Engineering or related subjects.
• Working towards Chartered Membership of CIBSE IMechE or an equivalent professional body with a clear interest in continued professional development.
• Experience of industry-standard software and tools such as IES Hevacomp StabiCAD Revit NBS and Microsoft packages. Knowledge of thermal modelling for compliance and design optimisation would be beneficial.
• Knowledge of UK technical standards and codes of practice.
• Familiar with energy reduction methods and approaches to decarbonising new and existing buildings.
• Awareness of energy and carbon-related data capture and analytics with an interest in improving building performance and supporting low-carbon design.
• Experience of designing for measurement and verification including commissioning and post-installation evaluation of performance.

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.

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Were AtkinsRéalis a world-class engineering services and nuclear organization. We connect people data and technology to transform the worlds 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. Were committed to leading our clients across our various end markets to engineer a better future for our planet and its people.

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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.

At AtkinsRéalis we seek to hire individuals with diverse characteristics backgrounds and perspectives. We strongly believe that world-class talent makes no distinctions based on gender ethnic or national origin sexual identity and orientation age religion or disability but enriches itself through these differences.