Roelof Kruize is CEO of Waternet, the Public Watercycle organization of the Amsterdam region. Waternet is responsible for drinking water, waste water, groundwater, surface water and safety behind the dikes. It is a joint executive service run by the City of Amsterdam and the regional public water authority Amstel, Gooi and Vecht.
After various functions for the City of Amsterdam he became member of the board of directors of one of the predecessors of Waternet in 1997 and in 2002 he became CEO. From 2008-2012 he combined CEO of Waternet with CEO of Waste to Energy Company of the city of Amsterdam.
He developed many national and international activities. He is president of the Royal Dutch Waternetwerk. He was president of the European Water Association and is the Dutch representative in the International Water Association (IWA).
In 2003 he was elected government manager of the year in the Netherlands.