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1988 - 1990
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Co-Founder, Managing Director, Res Oeconomica Verlags GmbH, Nürnberg
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1991 - 1995
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Research group for business information systems, Bavarian research center for
knowledge-based systems (Bayerisches Forschungszentrum für Wissensbasierte Systeme, FORWISS), Erlangen
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1995 - 1998
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Product development Human Ressource Magagement Systems, DATEV eG, Nuremberg
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1997 - 1998
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Assistant Professor for business information systems, Georg-Simon-Ohm-University, Nuremberg
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since 1999
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Professor for business information systems, Pforzheim University, Pforzheim
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