since 2002 Full Professor at Institute for Data Technology, Electrical Engineering and Communication Technology, Technische Universität Darmstadt
1998 – 2002 Associate Professor at Institute for Software Technology, Faculty of Computer Science, University of the German Armed Forces, Munich
1996 Research Visit at Computing and Information Science Department, Queen’s University, Kingston, Canada
1994 Research Visit at Chair of Software Engineering and Information Systems, Rijksuniversiteit Leiden, The Netherlands
1993 – 1998 Scientific Assistant (C1) at RWTH Aachen
1986 – 1992 Research Assistant at RWTH Aachen
1986 Research Assistant at University of Osnabrück
