Candidates Sociology, University Utrecht, Netherlands, 1964, Doctor Cultural Anthropology, 1969. University counselor University Eindhoven, Netherlands, 1969-1971. Educational consultant Dutch Government, Utrecht, 1971-1974.
Educational and organization consultant Holland Training Services, Arnhem, Netherlands, since 1974. Director Christian Life School, Hague, since 1975, Dunamis, Arnhem, 1985-1988, World Vision Nederland, since 1987.
- Editor numerous magazines, since 1975. Contributor articles to professional journals. Board directors World Vision of Europe, London, 1984, Far East Broadcasting Corporation, Netherlands, 1984, Middle East Media, Cyprus, 1985, Operation Mobilization, Rotterdam, 1976.