1992-2015: Prof. für Controlling an der Ruhr-Universität Bochum
1996: Ruf an die Universität Tübingen (abgelehnt)
2004-heute: Prof. für Betr. Steuerlehre an der Universität Graz
2008: Ruf an die TU Dresden (abgelehnt)
2009: Ruf an die Humboldt-Universität zu Berlin (abgelehnt)
2004-2007: Prof. für Betr. Steuerlehre an der Universität Magdeburg
2008-heute: Prof. für Betr. Steuerlehre an der Universität Würzburg
2007: Ruf an die TU Chemnitz (abgelehnt)
2007-2010: Prof. für Betr. Steuerlehre an der WHU Koblenz-Vallendar
2011-heute: Prof. für Betr. Steuerlehre an der LMU München
2010-2012: Jun.-Prof. für Betr. Steuerlehre an der WHU Koblenz-Vallendar
2013-heute: Prof. für Betr. Steuerlehre an der WHU Koblenz-Vallendar
2020-heute: Prof. für Betriebliche Steuerlehre und Rechnungswesen an der Hochschule Neu-Ulm
1999-heute: Prof. an der Hochschule für Wirtschaft und Umwelt Nürtingen-Geislingen
2009-heute: Prof. an der Dualen Hochschule Villingen-Schwenningen
2010-heute: Prof. für Externe Rechnungslegung und Wirtschaftsprüfung an der Hochschule Reutlingen
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