Trained as an industrial clerk at Philipp Holzmann AG (1983-1985)
Studied business administration at the University of Mannheim (1985-1989), graduated as a businessman (1989)
Research assistant at the University of Mannheim, Chair of General Business Administration, Public Administration and public enterprises, in particular hospitals (1989-2000), Doctorate (1994), Habilitation (2000)
Controller at the main association of professional trade associations, Saint Augustine (2000-2002)
University Professor at the Justus-Liebig-University Giessen, Professor ship for management of personnel utilities (since 2002)