Background
Valstar, Johan was born on January 2, 1970 in Naaldwijk, Netherlands.
Valstar, Johan was born on January 2, 1970 in Naaldwijk, Netherlands.
Doctor of Philosophy, Delft University of Technology, Netherlands, 2000.
Geohdyrologist The Netherlands Organization, Utrecht, Netherlands, 1999—2007. Senior geohydrologist Deltares, Netherlands, since 2008.
Married.