In 2021, RSK acquired MWH Treatment. Established in 1820, MWH Treatment is a sector-leading solution provider operating across the UK water industry, with over 800 process-intelligent professionals. Its truly integrated design-and-build culture offers a complete range of end-to-end services for all water and wastewater solutions, from £100 million major projects through to minor capital maintenance and nature-based solutions, utilising its 100-strong multi-trade direct workforce and infrastructure asset management team. The company is a recognised leader in providing sustainable engineering solutions for critical non-infrastructure water assets, specifically water and wastewater treatment works, pumping stations and reservoirs.

Our teams are co-located across six major frameworks, including integrated joint ventures and alliances, for Anglian Water, Scottish Water, Severn Trent, Southern Water, Thames Water and United Utilities.