About Matthijs Lemans

As a specialist in operational management at Deltares, Matthijs Lemans is closely involved in the development and implementation of real-time water information and forecasting systems. In these projects, he works closely together with experts from various hydro-meteorological authorities and hydro power companies, including those in the United States, Canada, Spain and the Netherlands. Matthijs not only advises on the technical development of these Delft-FEWS applications, but also on their use by operators and the institutional embedding of the applications within the prevailing operating procedures of the client.

In 2007, Matthijs successfully completed his Master's degree in Water Resources Management at Delft University of Technology with a thesis on the application of real-time control techniques to large water systems. He then worked for the National Institute for Freshwater and Wastewater (RIZA), where he provided support to various projects on climate change, river analyses and flood forecasting. Since 2008, Matthijs has been working at Deltares, and from 2012 to 2017 also at Deltares USA Inc, on numerous applications of the Delft-FEWS software, mainly in the field of Early Warning for government agencies and reservoir optimization for energy companies.

As of April 2026, Matthijs is the new Regional Manager for the United States and Canada. In this role, Matthijs coordinates Deltares' diverse activities in this region and advises the Deltares Management Team on international markets, clients, partners, and tenders.

In addition to developing and coordinating Deltares knowledge and tools, Matthijs is also active in an operational duty role as a member of the Crisis Advisory Group at the Water Management Centre Netherlands of Rijkswaterstaat in preparing discharge forecasts for the Rhine and Meuse rivers.