Principal Mechanical Engineer

Snc-Lavalin; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Hybrid working culture

Job summary

AtkinsRéalis in the United Kingdom is seeking a Principal Mechanical Engineer to lead building services design from concept to handover. You will act as Technical Lead on multi-disciplinary projects, driving sustainable, energy-efficient solutions and BIM coordination using Revit.

You will mentor engineers, help win work, and ensure compliance with UK regulations while maintaining strong client relationships across healthcare, education and industry sectors.

Qualifications

• Degree qualified in Mechanical Engineering, Building Services Engineering, or a related discipline.
• Chartered Engineer (CEng) with CIBSE, IMechE or an equivalent professional institution.
• 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.

Responsibilities

• 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.

Skills

Leadership of design teams

UK building regulations knowledge

Client engagement

Design calculations

Communication and reporting

Education

Degree in Mechanical Engineering or Building Services Engineering

Chartered Engineer (CEng) with CIBSE/IMechE

Tools

Revit

Job description

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

• 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.

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.
• Be rewarded.

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.

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.

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. Created by the integration of long‑standing organizations dating back to 1911, AtkinsRéalis is a world‑class engineering services and nuclear company dedicated to engineering a better future for our planet and its people. We create sustainable solutions that connect people, data and technology to transform the world’s infrastructure and energy systems. We deploy global capabilities locally to our clients and deliver unique end‑to‑end services across the whole life cycle of an asset including consulting, advisory & environmental services, intelligent networks & cybersecurity, design & engineering, procurement, project & construction management, operations & maintenance, decommissioning and capital. The breadth and depth of our capabilities are delivered to clients in strategic sectors such as Engineering Services, Nuclear and Capital. News and information are available at Atkinsrealis or follow us on LinkedIn.