Graduation as Diplom-Kaufmann, Business Administration, Hamburg University (1983)
Reserach Assistant, Institute for Statistics and Econometrics, Hamburg University (1984-1987)
Promotion (Dr. rer. pol.), Economics, Hamburg University (1987)
University Assistant, Institute for Logistics & Transport, Hamburg University (1987-1993)
Habilitation, Operations Management, Hamburg University (1993)
Professorship in Industrial Management, Faculty of Economics and Social Sciences, Helmut-Schmidt-University (German Federal Armed Forces), Hamburg (Visiting Professor) (1993-1994)
University Professor for Business Administration, Faculty of Economics and Social Sciences, Cologne University (1994-1995)
University Professor for Management Accounting and Operations Management, Business Administration and Economics Department, Bielefeld University (since 1995)
Dean of the Business Administration and Economics Department, Bielefeld University (1997-1998, since 2015)
Student Dean of the Business Administration and Economics Department (2005-2009)
Reserach Stays at the Kelly School of Business, Indiana University, Bloomington, IN (2010, 2011; DAAD-Scholarship 2010)
Erasmus Guest Lecturer at the Vienna University (2005); Lecturer at the German speaking MBA degree course at the Academy of National Economy in Moscow (1998-2005) and at the eMBA degree course at the University of Mannheim (2006-2007)