Graduate, Technology University Twente, Netherlands, 1977.
Researcher Shell Research, Amsterdam, 1977—1981. Biotechnologist Shell Bioscience, Sittingbourne, England, 1981—1984. Research team leader Shell Research, Amsterdam, 1984—1987.
Senior advising technologist Shell Chemicals, Rotterdam, 1987—1992, senior reactor specialist The Hague, 1992—1996. Principal process developer Shell Research and Technology, Amsterdam, since 1996. Professor department chemical engineering Delft University of Technology, since 1997, part-time professor sustainable chemical technical, since 1997.
Member city council City of Capelle Ady, Netherlands, 1994—2001. Member of Kon. Institute of Ingenieurs.
Married Mineke Spruüt Harmsen, February 20, 1951. Children: Joost, Maaike, Wouter, Julia, Emily.