 Voorhoeve also served as a Distinguished Professor of Governmental studies and International relations at Leiden University from December 1990 until August 1994.After the election of 1994, Voorhoeve was appointed as the Minister of Defence and the Minister for Netherlands, Antilles, and Aruba Affairs in the Cabinet Kok I, taking office on 22 August 1994.After the election of 1998, Voorhoeve returned as a Member of the House of Representatives and took office on 19 May 1998.