2004 - present
Full Professor at the University of Cologne, Faculty of Management, Economics and Social Sciences

2002 - 2004
Full Professor at the University of Lüneburg

2000- 2002
Researcher at the Institute for Development and Peace, University of Duisburg

1999 - 2000
Deputy professor at the Institute of Geography, University of Cologne

1993 - 1999
Assistant and Habilitation, University of Düsseldorf

1991 - 1993
Volkswagen AG, Assistance of the General/European Works Council

1988- 1991
Scholarship for Dissertation and PhD, Goethe University Frankfurt