Principal Mechanical Engineer

3 weeks ago


Reading, United Kingdom Thames Water Full time
Job Description

As the Principal Mechanical Engineer, you have a unique opportunity to lead a dynamic team of engineers. Your leadership will be instrumental in shaping the ‘Intelligent Client’ that will propel us towards our ambitious AMP8 goals and beyond. Your expertise in Mechanical Engineering is essential but crucial to the success of our pioneering projects.


Join us in this exciting role where your contributions can make a difference. Help us redefine the future of engineering at Thames Water and be part of a transformative journey This is not just a job but a career-defining opportunity that will propel your professional growth.


What you’ll be doing as a Principal Mechanical Engineer:

Elevate Engineering Excellence

  • Define Success - Set precise technical requirements with Project Definition Briefs, ensuring projects start strong.
  • Innovate Continuously - Refine Technical Asset Standards to enhance efficiency and effectiveness in our processes.

Commitment to Compliance

  • Champion Regulations -Uphold Engineering Regulatory standards in Mechanical Engineering to ensure our assets thrive.
  • Design Solutions - Lead the creation of innovative designs for the water and wastewater industries.

Collaborative Spirit

  • Synergize Teams - Work with multi-disciplinary teams to tackle engineering challenges and ensure adherence to strict design codes.
  • Lead with Impact: Guide teams on mechanically focused projects, making a meaningful difference.

Transform Failures

  • Learn and Improve - Conduct equipment failure root cause analysis to reduce future occurrences and enhance reliability.

Technical Expertise

  • Contribute Value - Provide essential insights for project definition briefs and asset assessments.
  • Ensure Delivery - Achieve technical sign-off and assurance throughout project delivery and handover.

Drive Innovation

  • Pioneer Technology - Support the development of cutting-edge technologies in research.
  • Develop Tools - Create innovative software and apps to empower our engineering team.

Empower Future Leaders

  • Establish Excellence - Help create a Centre of Excellence that nurtures talent and fosters growth.
  • Mentor Emerging Talent - Guide graduates and apprentices, shaping the next generation of industry experts.


Hybrid – Clearwater Court, Reading, you will be required to attend the office or site 3-4 days a week

36 hours a week

You will be a driver and have access to a car; this role comes with £5.8k car allowance.


What you should bring to the role:

  • Be degree qualified or equivalent in mechanical engineering with charters through a relevant awarding body.
  • A Mechanical Engineering background in one or more sludge digestion and treatment, biogas and CHP systems, water and wastewater treatment, pumps/piping systems, or process equipment is essential.
  • Understanding of the regulatory environment to achieve Compliance with our Engineering regulatory requirements.
  • Had exposure to lead design engineering roles.
  • Exposure to supporting quantity surveyors/cost estimating teams in the scope development for cost modelling and budgetary proposals.
  • Understand the regulatory environment to achieve compliance with our engineering regulatory requirements.


What’s in it for you?

  • Competitive salary.
  • 26 days holiday per year increasing to 30 with the length of service. (Plus bank holidays)
  • Car Allowance.
  • Annual Bonus.
  • Private Medical Health Care.
  • Contributory pension – Defined Contribution - Maximum of 12% -2x employee contribution.
  • Personal Medical Assessments – Open to all once a year.
  • Wider benefits scheme including our benefits hub, which is packed full of offers and information to save you money and support your wellbeing.


Who are we?

At Thames Water, our purpose is crystal clear - to deliver life’s essential service so our customers, communities and planet can thrive.

Water is life’s great leveller. Every living thing needs it, every single day. From people to plants, birds to bees, farms to factories, we all need it to thrive, and we’re committed to taking care of it for us all.

But keeping water flowing is becoming harder. From scorching summers to wetter winters, extreme weather affects everything from our pipes to our local rivers. We need to keep millions more kettles boiling, public services operating, washing machines spinning, showers running and more, so every drop is more precious than ever. Are you ready to play your part?


Working at Thames Water

At Thames Water, we recognise that people are at the heart of our business. To help us succeed in providing life's essential service, we need a range of skills and capabilities, representative of society throughout our business.


We seek to attract and retain a cultural mix of people who can offer different but complementary attitudes, values, talents, and knowledge. We understand the importance of appreciating and harnessing the unique skills, experiences, backgrounds, and differences that each individual brings.

Our over-arching diversity and inclusion aim is to ensure Thames Water is a diverse and inclusive great place to work. We encourage applications from everyone and offer extra support for those who need it throughout the recruitment process.


Find out more about working at Thames Water.


When a crisis happens, we all rally around to support our customers. As part of Team Thames, you’ll have the opportunity to sign up to support our customers on the frontline as an ambassador. Full training will be given for what is undoubtedly an incredibly rewarding experience. It’s also a great opportunity to learn more about our business, meet colleagues and earn some extra money along the way.


Disclaimer: due to the high volume of applications we receive, we may close the advert earlier than the advertised date, so we encourage you to apply as soon as possible to avoid disappointment.



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