1980-1982 Research assistant, Nederlands Instituut voor Sociaal Sexuologisch Onderzoek, in a project on the experiences and coping styles of married couples.
1982-1984 Project leader - methodologist, Centraal Bureau voor de Statistiek (Heerlen). Design, organization and implementation of survey studies.
1984 Teacher, social psychology, University of Maryland, European Division.
1985-1988 Teacher of psychology and psychiatry, Hogeschool Haarlem/Stichting Opleidingen tot Sociale Arbeid (Alkmaar).
1985-1986 Assistant professor, Institute of Sociology, Universiteit van Amsterdam. Research on bureaucratic organisations. Courses in foundations and methods of sociology.
1986-1991 Assistant professor, section Introduction & Foundations, dept. of Psychology, Rijksuniversiteit Groningen. Research on foundations of psychotherapy. Courses: introductory courses and courses on the cybernetics of self-organising systems and 'radical constructivism'.
1991-1992 Psychologist, Riagg Maastricht (Psychosociale Hulpverlening: short term therapies)
1992-1994 Consultant psychologist, Stichting Reclassering Zuid-Limburg, Maastricht.
1994-2021 Assistant professor of behavioral sciences, School of General Practice, Medical Dept., Universiteit Maastricht.
1995-1997 Psychologist, Riagg Maastricht (Afdeling Spreekuurteam en afdeling Psychosociale Hulpverlening: psychodiagnostic screenings and short term therapies).
1997-2004 Psychotherapist in private practice.
2004-2006 Partner/director of "Psychotherapiepraktijk Maastricht".
2006-now Director of EDT Maastricht, mental health care center/institute of experiential dynamic psychotherapy.