1991 - 1999 Clinical Psychologist at Rijnlands Zeehospitium Katwijk, Netherlands; private practice as behaviour therapist at Rotterdam
2000 – 2002 Clinical Psychologist / Behaviour Therapist at Erasmus Medical Center, Department of Child and Adolescent Psychiatry, Rotterdam
2004 – 2010 Department of Child and Adolescent Psychiatry, University of Zurich
Since 2010: Treatment Unit for OCD and Tic Disorders, Department of Child and Adolescent Psychiatry, University of Zurich
Since 2016: Private Practice for Cognitive Behavioural Therapy
I am the author of two therapeutic computer games: Treasure Hunt for children with various disorders and Ricky and the Spider for children with obsessive compulsive disorder.