Management team

  • Gerrit Hiemstra, MSc

    Co-founder and Chief Executive Officer

    Gerrit is a meteorologist with in-depth experience in the meteorological field. He graduated in 1986 at Wageningen University as Agricultural Engineer, with a specialisation in Agricultural Meteorology, followed by a 9-year period as operational weather forecaster in a commercial weather company.

    After a brief period as head of the operational weather service at Schiphol Airport he founded the successful commercial weather company WeerOnline, which was sold in 2009.

    Gerrit is also the well-known weather presenter of NOS, the national news organisation of the Netherlands, since 1998.

    At Weather Impact Gerrit is responsible for project acquisition and contract management.

  • Arnold Lobbrecht, PhD

    Co-founder and Chief Technology Officer

    Arnold graduated in 1986 from Delft University of Technology as Civil Engineer. He gained experience in hydrology, water management and informatics during a 12-years period at a multinational consultancy firm.

    After 4 years of research he obtained in 1997 his PhD in operational water management. After that he became part-time professor of hydroinformatics at UNESCO-IHE in Delft, guiding a group of PhD researchers. In 2000 he established HydroLogic, a hydroinformatics company, working on water & ICT projects.

    His experience is in decision support systems with focus on flood forecasting, water availability and droughts.