Ten firms are to share more than £1bn of water engineering work across the East of England.
Northumbrian Water Group awarded infrastructure upgrade and maintenance deals for its two separate regions.
A joint venture of Esh Construction and MWH secured one of four places on a £500M framework to upgrade sewer and water pipes as well as treatment assets.
It will be joined by Mott MacDonald Bentley, Interserve and Integrated Water Services on the panel, which will cover work in the North East, Essex and Suffolk.
Starting on 1 October, the deals run for 10 years.
County Durham-based Esh Construction was also appointed to maintain 30,000km of sewers in the North East, along with Hartlepool firm Seymour Civil Engineering Contractors.
Fastflow Pipeline Services, Crossglade, Lowman and T4 Survey will maintain and upgrade 26,000km of water pipes in the North East, Essex and Suffolk.
Northumbrian Water Group head of asset delivery John McGovern said: “These partnership agreements clearly demonstrate our commitment to providing our customers, who rely on us every day, with an excellent service and to protecting the environment. The contracts will boost the economy of our region and of the local communities we serve and will also support employment.
“We are working closely with all companies involved to ensure the smooth transition of contracts and we look forward to working with those appointed. Having long-term framework agreements in place will enable better planning, relationship building and the transfer of in-depth knowledge and skills. As a result of the security that this work brings, those who have won contracts will also be able to further invest in their own businesses, people and systems.”