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MWH Treatment

UK water-sector design-and-build contractor known for integrated delivery across major water and wastewater frameworks.

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Highlights

Roots dating to 1820
The company describes its water-sector heritage as extending back 200 years.
6 major water frameworks
Frameworks cover Anglian Water, Scottish Water, Severn Trent, Southern Water, Thames Water and United Utilities.
1,000+ staff across 8 regional centres
Stated in the company’s 2026 apprentice recruitment information.
75%+ of clients’ non-infrastructure assets
MWH Treatment states that its legacy covers more than three-quarters of these assets.
100+ direct multi-trade employees
The direct workforce supports in-house delivery alongside framework and alliance teams.

About MWH Treatment

MWH Treatment traces its engineering heritage to 1820, while the current legal company was incorporated in 1980. Its corporate history includes Biwater Treatment, MWH and Stantec Treatment; RSK acquired MWH Treatment in 2022. mwhtreatment.com

The company provides end-to-end services for water and wastewater assets, including engineering, procurement, construction, commissioning, maintenance, asset management and process optimisation. It works through alliances, joint ventures and direct delivery teams for regulated UK water companies rather than selling primarily to private industrial clients. mwhtreatment.com

Its strongest differentiator is the combination of process engineering and construction delivery in one water-sector specialist. MWH Treatment highlights digital delivery, integrated design-and-build, partnership-based programme delivery and experience across clients’ non-infrastructure assets; its early-careers programmes expose graduates to design, site delivery and commercial or operational work. careers.mwhtreatment.com

Current openings

0 live · 1 total
Graduate Finance
Graduate · UK
Closed
TBC

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