Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Principal Mechanical Engineer - Water Sector

£44.1 - £52 per hourEstimated
Full-time

As a Principal Mechanical Engineer, you will lead the technical delivery of mechanical engineering projects across the full project lifecycle, from feasibility and optioneering through to detailed design, construction support and commissioning. You'll work closely with multidisciplinary teams, clients and contractors to develop practical, sustainable engineering solutions that deliver outstanding project outcomes. You'll provide technical leadership across water and wastewater treatment facilities, pumping stations and mechanical process systems, ensuring designs meet the highest standards of quality, safety and sustainability. Alongside project delivery, you'll mentor engineers within the team, contribute to technical governance, support project planning and collaborate with clients to develop innovative engineering solutions.

  • Degree qualified (or equivalent) in Mechanical Engineering.
  • Chartered Engineer (CEng) or actively working towards Chartership.
  • Experience delivering detailed mechanical design within the UK water sector.
  • Strong understanding of water and wastewater treatment infrastructure, pumping stations and associated mechanical systems.
  • Experience leading technical project delivery and coordinating multidisciplinary teams.
  • Excellent communication and stakeholder management skills.
  • Experience mentoring and supporting the development of junior engineers.
  • Desirable
  • Experience working alongside delivery contractors.
  • Experience across both infrastructure and non-infrastructure projects.
  • Experience supporting bids or business development activities.

    Scotland's water sector is entering a period of significant investment as Scottish Water continues to modernise and strengthen the country's water and wastewater infrastructure. At Stantec, we're helping deliver innovative, sustainable engineering solutions that will improve resilience, protect the environment and support communities for generations to come. We're looking for a Principal Mechanical Engineer to join our growing team in Edinburgh or Glasgow , where you'll help lead the delivery of major infrastructure and non-infrastructure projects across Scotland and the wider UK.
  • As part of one of the UK's leading multidisciplinary water consultancies, you'll work alongside recognised technical experts on a diverse portfolio of treatment works, pumping stations, conveyance systems and complex mechanical engineering projects. With a strong pipeline of work, investment in digital engineering and a collaborative team culture, this is an excellent opportunity to further develop your career while helping shape the future of Scotland's water infrastructure.,
  • We are driven to achieve: Named in the top 50 companies to work by Glassdoor 2025. Recognised by Corporate Knights as one of the world's top 10 most sustainable companies 2025. Named 'Best Place to Work' and 'International Consulting Firm of the Year' at the NCE Awards 2024.
  • We do what is right: Industry leading training and development as well as paid for professional subscriptions. A professional progression plan, supporting you to become chartered with ICE.
  • We are better together: A supportive and collaborative team environment and Early Careers peer group and wider ERG network (see more on our ERGs here: Stantec Employee Resource Groups).
  • Growth: We're on an exciting growth journey across the UK - we want you to be part of it!
  • Great Benefits: Competitive salary, bonus schemes, enhanced pension plan, annual leave with the option to buy/sell additional days, private medical insurance, group income protection & life assurance included as standard as well as discounted gym membership and lots more.
  • Hybrid / Flexible working: Enjoy a healthy work-life balance with our hybrid approach to flexible working.
  • Join us and help deliver the next generation of water infrastructure across Scotland and beyond. #UKWater About Stantec The Stantec community unites more than 34,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities. Our teams provide effective and relevant solutions, translating our clients' vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today's challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities. Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn't exactly align, we encourage you to apply.
Vacancy posted 3 days ago
Similar jobs that could be interesting for youBased on the Principal Mechanical Engineer - Water Sector in Stratford, Greater London vacancy
  • £54k - £69k per annumEstimated
     ...Stantec's national Hydraulic Engineering team and play a leading role in...  ...of the UK's largest regulated water frameworks. Working with major...  ...engineering within our business., As a Principal Hydraulic Engineer, you'll...  ...across the UK water sector. Beyond project delivery, you... 
    Suggested
    Long-term contract
    Permanent
    Full-time
    Hybrid working
    Flexible hours
    Stratford, Greater London
    11 days ago
  • £37k - £49k per annumEstimated
     ...We are seeking a Senior Mechanical Design Engineer to play a leading role within our Design Team, taking...  ...engineering solutions across a wide range of water and wastewater treatment projects. In...  ...in the UK water and civil engineering sectors. Together we deliver essential... 
    Suggested
    Permanent
    Full-time
    On-site
    Stratford, Greater London
    17 days ago
  • £62k - £80k per annumEstimated
     ...complex reinforced concrete water infrastructure projects. Act...  ...authority for structural engineering decisions across multidisciplinary...  ...coordination with civil, mechanical, process and geotechnical disciplines...  ...and develop Senior and Principal Engineers within the structural... 
    Suggested
    Long-term contract
    Permanent
    Full-time
    Hybrid working
    On-site
    Remote
    Stratford, Greater London
    5 days ago
  • £39k - £51k per annumEstimated
     ...Are you an experienced engineer with a background in crane systems, mechanical handling, or mechanical design? Do you enjoy solving complex engineering challenges in a highly regulated, safety-critical environment? If so, this could be the ideal opportunity for you. In this... 
    Suggested
    Permanent
    Full-time
    Remote
    Stratford, Greater London
    10 days ago
  • £54k - £69k per annumEstimated
     ...Stress Engineer - Structural Integrity You will join a specialist engineering team supporting the safety and performance of critical infrastructure within a highly regulated environment. This role offers primarily remote working, with occasional site visits as required... 
    Suggested
    Permanent
    Full-time
    Remote
    Stratford, Greater London
    10 days ago
  • £33k - £42k per annumEstimated
     ...Assistant Civil Engineer - Water (expression of interest) Glasgow, GBR Stantec 2026-07-01T18:58:54.768Z We're seeking Civil Engineers within the water sector! Our civil engineering team are seeking expressions of interest from Civil or Assistant Civil Engineers... 
    Permanent
    Full-time
    On-site
    Stratford, Greater London
    10 days ago
  • £74k - £96k per annumEstimated
     ...join a team of innovative and passionate engineers? This is an exciting time for AECOM's Energy...  ...the lights on, providing access to clean water, or transforming skylines, our work helps...  ...the environment, our public- and private-sector clients trust us to solve their most complex... 
    Hybrid working
    On-site
    Remote
    Flexible hours
    Stratford, Greater London
    4 days ago
  • £36k - £47k per annumEstimated
     ...Are you a skilled civil engineer with a passion for designing sustainable...  ...innovative solutions for water and wastewater treatment projects...  ...integrate smoothly with mechanical, electrical, and process engineering...  ...water and civil engineering sectors. Together we deliver essential... 
    Permanent
    Full-time
    On-site
    Stratford, Greater London
    17 days ago
  • £32k - £42k per annumEstimated
     ...and extra works/emergencies in line with the contract needs on Mechanical Services. To carry out project works and minor turnkey projects...  ...with the boiler, heating and ventilation systems, pumps, water tanks, valves, pipe work and associated mechanical systems or items... 
    Permanent
    Full-time
    Stratford, Greater London
    2 days ago
  •  ...equivalent) in Civil and/or Structural Engineering, or a similar discipline...  ...Designers for Scottish Water's SR27 Enterprise . This transformational...  ...is looking for passionate Principal and Associate Structural...  ...environment, our public- and private-sector clients trust us to solve... 
    Full-time
    Temporary
    Part-time
    Hybrid working
    On-site
    Remote
    Flexible hours
    Stratford, Greater London
    5 days ago
  • £58k - £78k per annumEstimated
     ...You're a Principal Fire Engineer who wants to lead at scale-across complex projects, client relationships, and the direction of a growing team....  ...contribute to safer, more resilient buildings across multiple sectors. Beyond individual projects, your impact will extend to... 
    Permanent
    Full-time
    Hybrid working
    Flexible hours
    Stratford, Greater London
    13 days ago
  • £56k - £71k per annumEstimated
     ...To act in a senior and principal technical capacity in producing Burns & McDonnell's UK engineering-related project deliverables relating to power system Protection & Control...  ...the UK electricity transmission & distribution sector. Knowledge of engineering design management... 
    Permanent
    Full-time
    Stratford, Greater London
    10 days ago
  •  ...Amentum is seeking a Technical Director - Ports and Maritime Engineering to join our UK team, supporting the delivery of critical infrastructure within the Defence sector. This role offers a flexible hybrid working model, combining office-based, remote, and occasional UK site... 
    Hourly pay
    Permanent
    Part-time
    Hybrid working
    On-site
    Remote
    Flexible hours
    Stratford, Greater London
    22 days ago
  • £30.78k per annum

     ...Looking for an exciting new opportunity? We've got you covered! Due to business growth, we need a Trainee Water Hygiene Engineer to join our team in the Stratford (London) area. Key Responsibilities: Conduct ACoP L8 HSG274 part 2 compliance related work TMV Fail... 
    Permanent
    Traineeship

    Rock Compliance Ltd

    Stratford, Greater London
    9 days ago
  • £50k - £65k per annumEstimated
     ...infrastructure projects, across the utility and social infrastructure sectors. Our team of highly skilled and hardworking specialists deliver...  ...Infrastructure specialists design, build and maintain critical water, energy (gas), power and telecoms infrastructure, for the UK's... 
    Long-term contract
    Permanent
    Full-time
    Stratford, Greater London
    2 days ago
  • £52.55k per annum

     ...Principal Structural Engineer AECOM Glasgow £52,550 per year - estimated ? Part time NEW Job Description Start here. Grow here...  ...recently been named as one of two Primary Designers for Scottish Water's SR27 Enterprise . This transformational, multi-billion-... 
    Temporary
    Part-time
    Hybrid working
    Flexible hours
    Stratford, Greater London
    5 days ago
  • £36k - £47k per annumEstimated
     ...infrastructure projects, across the utility and social infrastructure sectors. Our team of highly skilled and hardworking specialists deliver...  ...Infrastructure specialists design, build and maintain critical water, energy (gas), power and telecoms infrastructure, for the UK's... 
    Permanent
    Full-time
    Stratford, Greater London
    3 days ago
  • £38k - £50k per annumEstimated
     ...are seeking a Senior Process Engineer to take a leading role within...  ...across a diverse portfolio of water and wastewater treatment projects...  ...water and civil engineering sectors. Together we deliver essential...  ...support them. As the Group's mechanical, electrical, instrumentation,... 
    Permanent
    Full-time
    On-site
    Stratford, Greater London
    17 days ago
  • £360 - £410 per day

     ...Site Engineer RTL Group Ltd Glasgow, Glasgow City £360 - £410/day Contract NEW I am working alongside a leading civil engineering...  ...contracts being awarded. My client operates across the civils sector on renewable energy projects. Site Engineer responsibilities:... 
    Permanent
    Full-time
    Stratford, Greater London
    11 days ago
  • £62k - £81k per annumEstimated
     ...Engineering Manager: Lead Scalable Platform Delivery Posting date: 2026-06-22T00:00:00 Location Glasgow Scotland UK G4 0 Application type: Any Apply4U Application deadline: 2026-09-21T00:01:35.483 0 0 Barclays is seeking an Engineering Manager... 
    Permanent
    Full-time
    Stratford, Greater London
    19 days ago
  • £44k - £57k per annumEstimated
     ...Geotechnical and Engineering Geology graduates at AECOM will work on a...  ...above An MSc/MEng in Soil Mechanics, Geotechnical Engineering or Engineering...  ...on, providing access to clean water, or transforming skylines, our...  ..., our public- and private-sector clients trust us to solve... 
    Permanent
    Full-time
    Hybrid working
    On-site
    Flexible hours
    Stratford, Greater London
    5 days ago
  • £46k - £61k per annumEstimated
    Overview: Gopuff is looking for a Operations Supervisor to join the Operations team. Directly reporting to a Site Leader, Operations Supervisor play an essential role at Gopuff that requires drive, perseverance, positivity, and enthusiasm for the challenge. The Operations...
    Full-time
    Night shift

    gopuff

    Stratford, Greater London
    19 days ago
  • £43k - £55k per annumEstimated
     ...We're looking for a Controls Engineer to take ownership of automation across one of our largest manufacturing sites. Working as part of the Engineering team, you'll be responsible for maintaining, improving and developing our automated production systems. This is a hands-... 
    Permanent
    Full-time
    On-site
    1 day/week
    Stratford, Greater London
    5 days ago
  • £52k - £67k per annumEstimated
     ...developing our systems and our people to improve site automation performance. We are now looking for an experienced Automation Support Engineer to join our Bellshill site, playing a key role in delivering effective, reliable automation systems that create real value across the... 
    Permanent
    Full-time
    Stratford, Greater London
    5 days ago
  • £320 - £400 per day

     ...Site engineer responsibilities: ~ Setting out and producing As built surveys Reporting to project engineer Health and safety compliance to the highest level QA Raising design issues RFI's Site engineer requirements: Valid CSCS Card Civil engineering degree Laptop... 
    Permanent
    Full-time
    Stratford, Greater London
    4 days ago
  • £39k - £53k per annumEstimated
     ...Site Engineer RTL Group Ltd | 30/06/2026 Contract Construction Job Description My client is a leading sub-contractor who is overseeing the works on a RC frame and groundworks project around Glasgow. We are currently recruiting a site engineer to start a brand new... 
    Permanent
    Full-time
    Immediate start
    Stratford, Greater London
    12 days ago
  • £39k - £50k per annumEstimated
     ...You'll join a specialist engineering team supporting critical infrastructure within a highly regulated, high-hazard environment. In this...  ...ll also assess asset integrity, material condition, and ageing mechanisms to support ongoing safe operation. Working in a highly regulated... 
    Permanent
    Full-time
    Stratford, Greater London
    9 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Principal Mechanical Engineer - Water Sector. Be the first to apply!