Master of Science, Ultrecht University, 1985. Doctor of Philosophy, University Technology, Delft, Netherlands, 1989.
Researcher NIM-VSL, Delft, 1989-1997. Lecturer University Technology, Eindhoven, The Netherlands, since 1997. Vice-chairman International Measurement Confederation TC8, Hungary, since 1994.
Member WGDM, Paris, since 1996. Member Euromet expert group, Lyngby, 1991-1996. Member EAL Expert group, Delft, since 1990.
Treasurer Soviet Socialist Republic, Utrecht, 1977-1978, Solar Installers of Washington, Utrecht, 1979-1982.
Married Margaretha Lutina Broens. Children: Saskia, Jarich.