 Voorhoeve also served on several and councils on behalf of the government such as the Scientific Council for Government Policy, and the as an advocate, lobbyist and activist for causes such as human rights, humanitarianism, social justice, poverty reduction, democracy, the anti-war movement, the anti-nuclear movement, and European integration.Voorhoeve also served as a distinguished professor of Governmental Studies and International Relations at the Leiden University from 30 January 2000 to 30 December 2015, as a distinguished professor of International Relations and War Studies at the Royal Military Academy and the Royal Naval College from 1 January 2001 to 1 January 2011, and as a distinguished professor of Peace and Conflict Studies, International Relations and Public administration at The Hague University of Applied Sciences from 14 January 2011 to 15 March 2018.Voorhoeve has also written more than a dozen books since 1979 about Politics, International relations, and Development Cooperation.