Hans van der Kwast is senior lecturer in ecohydrological modelling at IHE Delft Institute for Water Education. Hans holds a PhD in Physical Geography. During his previous work at the Flemish Institute for Technological Research (VITO) in Belgium he participated in projects related to water quality modelling, land-use change modelling and the use of remote sensing for urban applications. Since 2012 he has worked at IHE Delft, the largest international graduate education institute in the field of water. In his teaching and capacity-development projects he actively promotes the use of open source tools and open data by young professionals from the water sector in the Global South. For this purpose he has developed free and commercial educational products. He co-authored the book QGIS for Hydrological Applications and is a board member of the Dutch QGIS Users Association.