Master of Science, University Utrecht, The Netherlands, 1979. Postgraduate, Netherlands Foundation Advancement of Tropical Research, The Netherlands, 1983. Doctor of Philosophy, Free University Amsterdam, 1985.
Researcher, Indonesia, 1984, National Historical Museum, Leiden, The Netherlands, 1986. Consultant HasKoning, Colombia, 1986, Aid Environment, Molukken, 1989. Senior scientist Netherlands Institute Sea Research, Den Burg, The Netherlands, since 1986.
Member Society for Science Research in the Tropics, since 1994.
Member Society Scientific Research in the Tropics, Dutch Society Aquatic Ecology.