1st and 2nd state examinations in law; Dr. jur., Dr. jur. habil.: University of Dortmund. Honorary doctorates: University of Dortmund; European Humanities University, Minsk. Research Assistant, University of Mannheim. Research Associate, Higher Administrative Court of Koblenz; Judge, Administrative Court of Neustadt an der Weinstrasse.
Founding professor, Stuttgart and Cologne colleges of public administration. Interim professor, University of Tübingen and University of Munich. Professor, University of Münster. Dean and textbook author, FernUniversität in Hagen. Founding professor, Technische Universität Dresden. Executive Director, Institute of Commercial Law, University of Hamburg. Dean of Administration and Staff Development, Director, Security Business Research Centre.
Since 2008: Academic Director of the continuing education master’s degree courses in Compliance and in Security Management and Enterprise Security, DUW; Director, Research Institute for Compliance, Security Management and Enterprise Security (FORSI).