Job Description

As MWH Treatment continues to flourish into AMP8, we are looking to strengthen our Engineering team with Graduate Mechanical Engineers, to join our Professional Development Programme for our 2026 intake. Based in the Thames Water region (Maple Lodge). Our challenging programme of work, across a variety of water and wastewater schemes is expected to be in the region of 400M.

Why Choose MWH?

Its your career, lets shape it together! We pride ourselves on putting people first with an inclusive and rewarding culture where success is recognised. Dedicated to attracting, retaining and enabling the development of our graduates to maximise potential. The graduate programme is tailored to your needs with a flexible and varied learning environment, you'll feel empowered to make decisions and harness your knowledge and practical skills. The sky's the limit!



Grow with us! As a growing company within the RSK group, we can offer a multitude of opportunities. MWH Treatment is preparing to play its part as one of the UK's leading Design and Build Contractors in the Water Industry. In response to the growing demand to improve further the UK water quality in our rivers and bathing waters amongst other challenges, the investment in the water industry is far exceeding any other time. MWH Treatment, as part of the RSK group, specialise in creating and providing practical, sustainable outcomes. Our engineers pioneer and perfect solutions. The variety of work we offer provides a platform for you to develop and master your subject to build a fruitful and purposeful career.

What will you be doing?

Working within the Design team you will be an integral part of the delivery of many projects by providing assistance in the following


Produce Mechanical design layouts which are cost effective and meet the requirements of the specification. Participate in development of sitewide 3D model and Visual Project Initiation (VPI) animations, communicating key project characteristics Production of clear and well-presented reports, specifications, and other engineering calculations & documentation. Become a Champion in a water or wastewater treatment process. Building up your commercial awareness working alongside with Design Managers in determining project deliverables and activities. Supporting the delivery of design within a multi-discipline environment Attend site visits on water & waste-water treatment works to conduct conditions assessments and site surveys Monitor design costs and provide design services appropriate to the allowance available Maintain files and records throughout the duration of contracts. Prepare design risk assessments Participate in Hazard & Operability (HAZOP) studies as well as Operability and Maintenance (OpMan) reviews Networking with leading suppliers in the Water sector through participation in relevant exhibitions.

What is the Graduate Programme?

Our Graduate Programme is shaped to enable you to successfully achieve professional status with the relevant professional institutions, whilst giving you exposure to everything you need to start your career on a successful path.



A committed and structured three-year Graduate Programme. Mentorship dedicated to you to support your career in becoming a chartered mechanical engineer through the IMechE MPDS process. A structured training plan. UK wide program with opportunities to network with your peers from other geographical regions An opportunity to rotate in both design and build (hands on site experience) * Practical, on the job training within your team of industry experts.