RSK Group, an European environmental, engineering and technical services group, completed the acquisition of MWH Treatment, a UK water engineering and construction management company. Financial terms were not disclosed. Financial terms were not disclosed. "The water sector is of huge importance to RSK and its strategy, so I couldn’t be more pleased to welcome MWH Treatment into the group. The company’s reputation across the UK is impeccable, and I see countless opportunities for collaboration and knowledge-sharing across the group," Alan Ryder, RSK Group Founder and CEO.