Principal Mechanical Engineer

AtkinsRéalis UK Limited; Greater London; Hybrid; GBP 70,000 - 105,000; Full time

Benefits offered by this job

Hybrid working culture

Flexible holidays

Professional development

Job summary

AtkinsRéalis UK Limited is seeking an experienced mechanical building services engineer in London to lead the design and delivery of projects from concept through handover.

You will act as Technical Lead, ensuring compliance with UK regulations and AtkinsRéalis quality procedures while developing innovative, energy‑efficient solutions and mentoring engineers and graduates.

This role offers hybrid working and opportunities across healthcare, education, and commercial 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.
• 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.

Responsibilities

• Lead mechanical design and delivery from concept to handover.
• Act as Technical Lead and Design Authority ensuring compliance.
• Develop innovative, energy-efficient engineering solutions across sectors.
• Provide technical leadership to multidisciplinary project teams.
• Build and maintain strong relationships with clients, contractors and stakeholders.
• Lead technical discussions and represent AtkinsRéalis at client meetings and design reviews.
• Prepare and review engineering calculations, reports, specifications and design documentation.
• Oversee the development and coordination of BIM models using Revit and other tools.
• Support project managers in delivery, programme, resources and budgets.
• Contribute to bids, proposals, fee submissions and client presentations.
• Mentor engineers, graduates and apprentices.
• Drive innovation and continuous improvement across the practice.
• Champion sustainability and net zero objectives.

Skills

Chartered Engineer (CEng)

Building Services Design

Mechanical Systems

Project Leadership

UK Building Regulations

Stakeholder Management

BIM / Revit

Education

Bachelor's degree in Mechanical Engineering or Building Services

Chartered Engineer accreditation (CEng)

Tools

Revit

BIM 360

Job description

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's 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. 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.

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.

Equal Opportunities and diversity statements

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 and employment details

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.