Principal Mechanical Design Engineer - Reading, Berkshire

Company: Thames Water

Location: Reading

Posted: May 18th, 2026

Principal Mechanical Design Engineer - Reading, Berkshire, RG1 8DB

Contract: PermanentSalary: Offering between 65,000 to 80,000 per annum, depending on the skills and experience of the successful candidate, plus a 5,800 car allowance.Lead the Future of Water Engineering Become Our Principal Mechanical Design Engineer

Are you ready to shape the future of water and wastewater infrastructure? As ourPrincipal Mechanical Design Engineer, youll take the lead in driving innovation, setting engineering standards, and mentoring a talented team of professionals. This is more than a technical role its a strategic opportunity to become the Intelligent Client at the heart of our AMP8 ambitions and beyond.

Your expertise will be pivotal in delivering sustainable, high-performing assets that make a real difference to communities and the environment.

What youll be doing as a Principal Mechanical Design EngineerLocation: Hybrid Clearwater Court, Reading

Working Pattern: 36 hours a week.

This position requires the candidate to have access to a vehicle and a valid driver's license. Additionally, there is a car allowance of 5,800 included.

What you should bring to the role

To thrive in this role, the essential criteria youll need are:Additional skills and experiences would be excellent to have/bring:Whats in it for you?Find out more about our benefits and perks (Please note different T&Cs apply if on secondment)

Who are we?

Were the UKs largest water and wastewater company, with more than 16 million customers relying on us every day to supply water for their taps and toilets. We want to build a better future for all, helping our customers, communities, people, and the planet to thrive. Its a big job, and weve got a long way to go, so we need help from passionate and skilled people, committed to making a difference and getting us to where we want to be in the years and decades to come.

Learn more about our purpose and values.

Working at Thames Water

Thames Water is a unique, rewarding, and diverse place to work, where every day you can make a difference, yet no day is the same. As part of our family, youll enjoy meaningful career opportunities, flexible working arrangements and excellent benefits.

If youre looking for a sustainable and successful career where you can make a daily difference to millions of peoples lives while helping to protect the world of water for future generations, well be here to support you every step of the way. Together, we can build a better future for our customers, our region, and our planet.

Real purpose, real support, real opportunities. Come and join the Thames Water family. Why choose us? Learn more.

Were committed to being a great, diverse, and inclusive place to work. We welcome applications from everyone and want to ensure you feel supported throughout the recruitment process. If you need any adjustments, whether thats extra time, accessible formats, or anything else, just let us know. Werehere to help and support.

When a crisis happens, we all rally around to support our customers. As part of Team Thames, youll 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. Its also a great opportunity to learn more about our business and meet colleagues.

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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