1980-1982 Research assistant, Nederlands Instituut voor Sociaal Sexuologisch Onderzoek (Dutch Institute for Social Sexuological Research), in a project on the experiences and coping styles of married couples.

1982-1984 Project leader - methodologist, Centraal Bureau voor de Statistiek (Heerlen) (Dutch Central Bureau of Statistics). 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) (school of social work).

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 (Regional Center for Mental Health), Maastricht (Psychosociale Hulpverlening: short term therapies)

1992-1994 Consultant psychologist, Stichting Reclassering Zuid-Limburg, Maastricht (criminal justice social rehabilitation service).

1995-1997 Psychologist, Riagg Maastricht (Afdeling Spreekuurteam en afdeling Psychosociale Hulpverlening: psychodiagnostic screenings and short term therapies).

1994-now Assistant professor of behavioral sciences, School of General Practice, Medical Dept., Universiteit Maastricht.

1997-2004 Psychotherapist in private practice.

2004-2006 Partner/director of "Psychotherapiepraktijk Maastricht"

2006-now Director of EDT Maastricht, institute for experiential dynamic psychotherapy (institute's license #73733121)