 He has been scientific collaborator at Leiden University (International Environmental Law), the Free University of Amsterdam (Nuclear Strategies) and UNISA, University of Pretoria (Asian Studies).Also he has been Secretary of the Dutch Inter-Ministerial Commission for Migrants from Suriname and the Dutch Antilles before he became active in the anti-immigration Centre Party/Centre Democrats.On 12 October 1999, he submitted a complaint against 3 members of the Dutch government regarding war crimes committed by it within the framework of NATO bombings on Yugoslavia at the International Criminal Tribunal for the former Yugoslavia in The Hague.