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Mott MacDonald • London, UK

Principal Mechanical Building Services Engineer

2 days/week at home

A little flex time – We’re happy to talk flexible working and how we can support your responsibilities beyond the workplace. We offer a range of options depending on your role, so please discuss this with your recruiter.

Apply now

Job Description

Mott MacDonald

We’re a global engineering, management, and development consultancy.
Our purpose is to improve society by considering social outcomes in everything we do, relentlessly focusing on excellence and digital innovation, transforming our clients’ businesses, our communities and employee opportunities.

A fundamental part of this is respecting each person’s differences and striving to meet their needs.

We are proud to be a one of Glassdoor’s top employers to work for in the UK, as well as being recognised as a Top Inclusive Company in the UK.

Our values: Progress, Respect, Integrity, Drive, Excellence.

About the business unit
The Buildings and Cities Unit (BNC) has a major presence in Mott MacDonald's regional offices throughout the UK and mainland Europe, providing a wide range of diverse and transferable cross-sector skills across five key Sectors; Advisory, Built Environment, Energy, Transportation and Water. We also provide local services to customers and technical leadership to the rest of the Group in these sectors.

Overview of role

Your role will be to support the Healthcare sector technical team in supporting the expansion of healthcare work in the London/South-East region.
We want to recruit a candidate who will provide healthcare sector technical delivery as part of the building and cities divisional teams delivering built environment healthcare projects. The role will include supporting technically led bid activity. Client relationship building – primarily through healthcare client technical support on matters such as site decarbonisation and the adaption and/or replacement of existing MEP engineering systems.

The candidate will be self-motivated and capable of delivering high-quality technical design/advisory services with limited supervision to time and budget. As part of a wider practice network the role will support the Healthcare sector team who have developed a strong reputation for work winning, successful project delivery and technical excellence.

The opportunity now exists for an individual to join this enthusiastic and growing team and to develop their career within the built environment sector at Mott MacDonald.

you will: -

  • Have responsibility for all aspects of assigned project work, and with a focus on healthcare sector built environment projects.
  • Support local project delivery staff on technical aspects of healthcare projects – developing/mentoring the teams to successfully deliver healthcare sector projects.
  • Working and liaising with associated engineering disciplines as part of bidding and delivering technical support.
  • Client facing on matters of a technical nature.
  • Support senior managers running the commercial and contractual side of built environment projects.
  • As a Principal level engineer you will be involved in a range of small to large projects within our built environment sector project delivery team. The role will be challenging, demanding, varied and offer opportunities for skill set and career development.
  • You will work autonomously within a team carrying out technical advisory/design commissions with a specialism in MEP mechanical engineering design.
  • The key elements of the role are (but not limited to);
  • Technical delivery of assigned built environment healthcare sector technical/advisory projects – specialising in mechanical building services engineering (MEP).
  • Working and liaising with associated engineering disciplines as part of delivering projects – primarily focussed on the health sector.
  • Liasing with external stakeholders, ensuring client satisfaction and pursuing and promoting opportunities with potential and established clients.
  • Be familiar with using relevant industry software (eg, IES, Revit etc).
  • Maintaining and monitoring programmes for scheduling and reporting on deliverables across specific projects.
  • Anticipating potential problems and communicating in line with client expectations.
  • Demonstrating technical expertise, providing in depth knowledge whilst proactively coaching and developing less experienced team members.

Candidate Specification

  • Ideally fully qualified (MCIBSE/CEng) and an experienced professional having the breadth of experience, ability and maturity to make good decisions across the key areas of their recognised discipline and demonstrating one or more of the following attributes:
  • Have experience of leading on building commissions.
  • Have experience of mentoring graduate engineers
  • Be enthusiastic and ambitious.
  • Possess good communication skills, including report writing and presentation.
  • Have the ability to lead elements of one large project or a portfolio of smaller projects.
  • Have some experience of managing client relationships.
  • Working as a specialist providing high level advice to others.
  • Track record of achievement and innovation, delivering complex projects or new services.
  • Supervising the work of other professionally qualified staff.
  • Emerging professional network externally and desire to build internal networks within the organisation.

We are actively recruiting a diverse workforce that is reflective of the communities we serve. We recognise that differences in ability, skills and experience are a strength and encourage applications from people of all backgrounds.


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.


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.

Agile working

Happy to talk Flexible Working and how we can support your responsibilities beyond the workplace.

We offer some fantastic benefits including:

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.

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.


  • 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.

Apply now, or for more information about our application process, click here.

Company benefits

Open to part-time employees
Adoption leave – 26 weeks full pay
Open to part time work for some roles
Buddy scheme
Flexible working week
Enhanced sick pay
Dental coverage
Compassionate leave
Health assessment
Eye Care Support – Eyecare vouchers
Private GP service – Private Medical care for all UK staff
Season ticket loan
Theme park discounts
Religious celebration leave
Buy or sell annual leave
Accrued annual leave
Caregiver Leave
Enhanced maternity leave – 26 weeks
Enhanced paternity leave – 2 weeks
Shared parental leave – We match up to 24 weeks full pay
Pregnancy loss leave
Tax-free childcare
In office yoga classes
Cycle to work scheme
Faith rooms
Salary sacrifice
Life assurance
Annual pay rises
Pension match/increase
Life insurance
Annual bonus
Income protection
Employee discounts
Professional subscriptions – We pay for your primary professional annual subscription
Lunch and learns
Employee assistance programme
L&D budget
Teambuilding days
More information needed
More information needed
More information needed
Work-life balance
More information needed
Role modelling
More information needed
More information needed

Working at Mott MacDonald

Company employees

18,000 worldwide

Gender diversity (male:female)


Office locations

UK Wide; London, Croydon, Birmingham, Derby, Altrincham, Manchester, Whitehaven, Newcastle, Middlesbrough, Durham, Bristol, Southampton, Reading, Cambridge, Peterborough, Brighton, Norwich, Glasgow, Edinburgh, Aberdeen, Inverness, Cardiff, Newport, Exeter, Leicester, Leeds, Skipton, York

Hiring Countries

United Kingdom

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