 After his doctorate in History Kuiper had, besides what is written above, different other positions, like teacher at the MO-teacherseducation History, at the Evangelische Hogeschool in Amersfoort, from 1991 until 1995 he was director of the Association for Reformational Philosophy in Utrecht and in 1995 he succeeded André Rouvoet as director of the Marnix van Sint Aldegonde Stichting, the Scientific Institute of the Reformational Political Federation until 2002.From 2000 until 2002 he was director of the Scientific Institute of the Christian Union, the Groen van Prinsterer Stichting.Currently Kuiper is member of the 'Nationale Conventie', a think tank for a revision of the national political system.