AtkinsRéalis
Principal Mechanical Engineer

How your CV stacks up
Upload your CV to see how well it fits this job role
?%
Job Description
Overview
AtkinsRéalis' Engineering and Design Practice is seeking an experienced and motivated Principal Mechanical Engineer to join our Building Services team. This is an exciting opportunity to play a leading role in the delivery of technically challenging and innovative projects across a diverse portfolio including Healthcare, Defence, Education, Commercial, Energy and Public Sector developments.
As a Principal Mechanical Engineer, you will provide technical leadership on multi-disciplinary projects, oversee the delivery of high-quality engineering solutions and develop trusted relationships with clients and project stakeholders. You will be part of a nationally connected team, collaborating with colleagues across the UK and globally through our Global Technology Centre to deliver sustainable, low-carbon and digitally enabled building services solutions.
This role offers the opportunity to influence technical direction, support business growth, mentor developing engineers and contribute to AtkinsRéalis' reputation for engineering excellence. Whether leading major healthcare developments, delivering critical infrastructure projects or advising clients on decarbonisation strategies, you will have the opportunity to make a meaningful impact on the built environment.
Your role
As a Principal Mechanical Engineer, you will:
- Lead the mechanical design and delivery of building services projects from concept through to detailed design, construction and handover.
- Act as Technical Lead and Design Authority on projects, ensuring compliance with relevant legislation, standards and AtkinsRéalis quality management procedures.
- Develop innovative, sustainable and energy-efficient engineering solutions across a wide range of sectors.
- Provide technical leadership and guidance to multidisciplinary project teams.
- Build and maintain strong relationships with clients, contractors and key stakeholders.
- Lead technical discussions and represent AtkinsRéalis at client meetings, workshops and design reviews.
- Prepare and review engineering calculations, reports, specifications and design documentation.
- Oversee the development and coordination of BIM models and design information using Revit and other digital engineering tools.
- Support project managers in managing project delivery, programme, resources, budgets and technical risks.
- Contribute to business development activities including bids, proposals, fee submissions and client presentations.
- Mentor, coach and support the development of engineers, graduates and apprentices.
- Drive innovation, technical excellence and continuous improvement across the practice.
- Champion AtkinsRéalis' sustainability agenda, supporting clients in achieving their net zero carbon and environmental objectives.
Reasons to use Rodeo
I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?
Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.
Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.
Start with a chat, not a search bar
Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.
Graduate Consultant — 2026 Scheme
Why you're a good match
StrongYour economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.
See breakdownIt searches the market for you
Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.
Why you're a good match
You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.
Experience fit
Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.
Only hits
No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
About you
You will be an experienced mechanical building services engineer with a passion for technical excellence, client service and developing people.
Essential Requirements
- Degree qualified in Mechanical Engineering, Building Services Engineering, or a related discipline.
- Chartered Engineer (CEng) with CIBSE, IMechE or an equivalent professional institution.
- Significant experience delivering mechanical building services projects within a consultancy environment.
- Demonstrable experience leading multidisciplinary design teams on complex projects.
- Strong understanding of UK building regulations, industry standards and engineering best practice.
- Experience in client-facing roles and managing stakeholder relationships.
- Ability to review, approve and direct the production of technical deliverables.
- Experience undertaking design calculations and using industry-standard software packages.
- Excellent communication, presentation and report-writing skills.
- Proven ability to lead, motivate and develop engineering teams.
Desirable Requirements
- Experience in Healthcare, Defence, Education, Commercial, Energy or Mission Critical sectors.
- Experience supporting bids and work-winning activities.
- Knowledge of digital engineering processes and BIM delivery.
- Experience of energy modelling, building performance evaluation and low-carbon design.
- Familiarity with modern methods of construction and offsite manufacturing.
- Understanding of decarbonisation strategies for existing building portfolios.
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.


Get help with your application
Your very own career expert that helps elevate your application to the next level.
Be rewarded. Find out more.
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.
Diversity and Inclusion
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.
Worker Type
Employee
Job Type
Regular
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.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
Skills
Location