Dr Sarah McMath


Dr Sarah McMath

Sarah has vast experience of the water industry, having worked in a variety of roles across a number of technical, asset management and operational teams over the past 28 years and most recently as Chief Executive of MOSL, the market operator for the non-household water market in England.

Sarah joined MOSL as CEO in June 2019. She has a strong track record for driving improvement and has become well-respected as a force for innovation and collaboration to ensure the open market delivers on its commitments to customers and tackles some of the biggest challenges facing the water industry. 

Sarah started her career at Thames Water in the innovation team, working as a research scientist, where she completed her doctorate in Environmental Engineering. In 2011, Sarah moved to the Strategy and Regulation team, leading the preparation and submission of Thames Water’s business plans for PR14 and held the responsibility of Programme Director for Competition 2017 ahead of the opening of the water retail market on 1 April. Sarah was previously Managing Director of Water at Thames, before becoming Managing Director of Strategic Planning and Investment in April 2018.

Sarah is also a trustee of the Don McMath Foundation, a charity which provides free schooling to children in the Gambia, and sits on the Board of the National Oceanography Centre and the Women’s Utilities Network. She is also Chair of the Water Efficiency Strategy Steering Group and a member of the National Drought Group and is an advocate for water efficiency and building resilience in the water sector.

Dr Sarah McMath

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