Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you’re surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued. Whatever your ambition, Mott MacDonald is where people come to be brilliant.

About the business unit

The Energy unit delivers services to clients globally across several sectors including hydropower, nuclear, waste, renewable generation and transmission & distribution networks. Together we provide integrated engineering and project management services across the project lifecycle – from concept and design to construction and operations, to decommissioning or repowering and life extension. Together with our clients, we’re helping to deliver the energy transition globally.

Overview of the role

Due to new project wins and continued growth, we’re looking for Senior Nuclear HVAC/Building Services Engineers to join our Power, Process & Nuclear division. This role offers an exciting opportunity to work on innovative projects across the defence and nuclear new-build industries. As part of our growing team, you will contribute to high-profile engineering challenges while developing your career within an organisation committed to supporting your professional growth.

Key responsibilities and duties include:

• Production and checking of detailed design calculations to support design requirements/development through concept and preliminary phases, and into detail design, to and assistance during installation and commissioning borne design queries. (RIBA Stage 0 to Stage 6)
• Producing documentation, assessment/condition reports, survey reports, basis of designs, procurement specifications. Contribute to the production of multi discipline design document such as, but not limited to: Project Requirement Documents, Project Verification Plans, Quality Plans, Design Justification Report
• Production and review of detailed design calculations to support design proposals
• Production and review of detailed design drawings, layouts and schematics including heating, ventilation, LTHW, Chilled Water, specialist LEV and BMS installations
• Experience in the delivery of written work, eg. functional Specifications, Basis of Design, Equipment Specifications and Validation and Verification plans
• Producing estimates of work elements including equipment and man hour costs
• Supporting the preparation of bids and estimates
• Ensure compliance with construction (design and management) regulations
• Mentoring and guidance of junior staff

The role requires knowledge and experience in project delivery with experience of optioneering and front-end design and detail design. Specific responsibilities are:

• Support the Project(s) in all aspects of HVAC with knowledge, specifically the delivery of the design of HVAC Systems or modification to existing HVAC Systems
• Working with a small integrated design team in the delivery of design packages against milestones
• Manage multiple projects at a time
• Determine project requirements independently
• Ability to estimate hours for scope changes or additional works along with outlining supporting schedule for the discipline
• Lead the delivery of the single discipline design reviews
• Support and contribute multi discipline design review
• Produce Reports and documentation to comply with CDM
• Manage content of schedules.

This role requires interface with Integrated Design Team, facility team (including systems engineering), other project functions and must work closely throughout project phases. The ability to work collaboratively in a team environment is essential. The candidate needs experience of working within a highly regulated industry, preferably gained within the nuclear industry. To be fully conversant with UK Statutory Regulations and industry design guides and standards relating to this discipline.

Candidate specification

• Degree in Building Services, Mechanical Engineering or equivalent
• Chartered status with the IMechE or other relevant professional body
• Experience within a highly regulated environment (Nuclear preferable, but will consider Oil & Gas, Pharmaceutical and Rail experience)
• Preferably knowledge & experience in nuclear containment ventilation design
• Broad knowledge of industry standards, legislation, and engineering principles, ideally including knowledge of nuclear ventilation guidelines and standards
• Experience of using design software such as Hevacomp, IES, Pipenet
• Revit and AutoCAD knowledge and experience will be beneficial
• Initiative and self-motivation to make decisions
• Good verbal and written communication skills
• In-depth knowledge of current Building Regulations and relevant Legislation

This role offers the opportunity to work at the forefront of the Nuclear HVAC field, delivering impactful projects for some of the industry’s most prominent clients.

Please be advised that offers for this role are conditional upon obtaining the appropriate level of Security Clearance.

UK Immigration

Mott MacDonald Ltd. are not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. This decision is as a consequence of the changes made to the Skilled Worker route by the UK Government in April 2024. We continue to welcome applications from candidates who are eligible for alternative immigration routes in the UK, that do not require sponsorship as a Skilled Worker now or in future.

Agile working

At Mott MacDonald, we believe it makes business sense for you and your manager to choose how you can work most effectively to meet your client, team, and personal commitments. We offer a hybrid working policy that embraces your well-being, flexibility, and trust.

Equality, diversity, and inclusion

We put equality, diversity, and inclusion at the heart of our business, seeking to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they can contribute.

Accessibility

We want you to perform your best at every stage in the recruitment process. If you are disabled or need any support to enable you to apply or attend an interview, please contact us at reasonable.adjustments@mottmac.com and we will talk to you about how we can support you.

We offer some fantastic benefits including:

Financial wellbeing

• We match employee pension contributions between 4.5% and 7%.
• Life assurance equal up to 4 x your basic salary, with an option to increase the level of cover to 6 x your salary.
• Our income protection scheme provides a financial benefit, as well as absence and return to work support due to long-term illness or injury.
• Flexible benefits, including increased life assurance cover, critical illness insurance, payroll saving and will writing.
• As an independently owned business we share the financial success of the business with all our colleagues in various ways including annual bonus schemes.

Employee Ownership

• Our employee ownership model means no external investors, just us, creating a culture of shared success.
• Our employees have a stake and a voice in our business, giving them a direct connection to our success through our personal and group performance bonuses.
• As your career grows, so does your stake, recognising your long-term impact and contribution.
• Your voice matters, with the opportunity to connect directly with senior leadership through formal channels to help shape our future.
• For our senior roles you will have a direct pathway towards ownership from day one.

Health and wellbeing

• Private medical insurance for all UK colleagues.
• Health cash plan to support you with every day health costs and treatments.
• Access to Peppy, providing free support from menopause experts for all UK colleagues.
• A variety of wellbeing support is available through our comprehensive wellbeing program, including access for you and your family.
• Ability to flex your salary to opt into a wide range of health benefits, many of which can be extended to your family too.

Lifestyle

• A minimum of 33-35 days holiday each year, inclusive of public holidays and dependent on level, with the ability to buy or sell leave through our flexible benefits programme.
• Holiday entitlement increased to a minimum of 35 days after 5 years’ service.
• Variety of employee saving schemes and discounts from high-street retailers.

Enhanced family and carers leave

• Enhanced family leave policies, including 26 weeks paid maternity and adoption leave, and two weeks paid paternity/partner leave.
• Our shared parental leave matches maternity leave meaning we pay up to 24 weeks at full pay.
• Up to five additional days leave are provided for those with significant caring responsibilities, two of which are paid.

Learning and development

• Primary annual professional institution subscription.
• A broad range of opportunities to enhance both technical and soft skills through mentoring, formal training, and self-development options.

Networks, communities, and social outcomes

• Join a wide range of groups including our Advanced Employee Networks which support our LGBTQ+, gender, race and ethnicity, disability, and parents/carers communities.
• Make a difference within our communities through our social outcomes.