Secondary teacher training Mathemathics and Physics (PTHN 1989-1993)
Teacher at C+B advice and expertice, telematics and lighting technique (1993-1997)
Teacher VSO/LOM De Stolberg Eindhoven maths and physics (1997-1999)
VSO Physics teacher and teachertrainer Katsina State Nigeria (1999-2001)
Teacher at Stebo Utrecht maths and physics (2002-2005)
Teacher at Gymnasium Beekvliet St. Michielsgestel maths (2007-2011)
Developer for e-leaning courses at Kelvin-trainingen (2013-)