He is psychiatrist, psychotherapist and researcher in private practice and at the University of Utrecht, the Netherlands. From 1999 till November 2015 he was affiliated to ‘Centrum ’45’ in Oegstgeest, the Netherlands: this is the National Institute for Psychotrauma Treatment and Research. Next to his private practice, he is connected as consultant psychiatrist at GGZ Integraal, a psychiatric outpatient service for migrant patients. He is specialised in cognitive behavior therapy, group therapy and directive treatment methods. He is a certified psychotraumatologist. His specialization is the diagnosis and treatment of traumatized refugees. He is occupied with the national education of residents in Transcultural Psychiatry, and with several other education programs, nationwide and abroad. He has an affiliation to the University of Utrecht, for research and education. In June, 2018, he got his Ph.D. title for the thesis:’Psychodiagnostic assessment with refugees. Studies on the Cultural Formulation Interview and Somatization.’
He is Secretary of the Johannes Wier Foundation for Human Rights and Health Care, based in Amsterdam.
In 2001, he was one of the founders of the Section on Transcultural Psychiatry of the Netherlands Association of Psychiatry, and for eight years he was Board Member and Secretary. Since 2007, he is Board Member and later Treasurer, of the Division on Psychotherapy of the Netherlands Association of Psychiatry.
Since August, 2008, till September, 2014, he was Board Member and later Chair of the Transcultural Section of the World Psychiatric Association. In 2014, he was appointed as Honorary Advisor of this Section. In the same year he was granted a Honorary Membership of the World Psychiatric Association because of his merits for the field.
Since 2014, he is Board Member of the World Association of Cultural Psychiatry. In 2015, he became Treasurer of this Association, and in that function he is one of the three officers.
He is member of the Editorial Board of the peer reviewed scientific journals ‘Transcultural Psychiatry’ and ‘World Cultural Psychiatry Research Review’. He is also editor of the Dutch journal for psychotherapy ‘PsyXpert’. He is occupied as peer reviewer for nine scientific journals, among which the ‘British Journal of Psychiatry’ and ‘European Psychiatry’.