Curriculum Vitae
- Born in 1943 in Ulm/Germany
- 1962-66: Studies of law in Tübingen, Freiburg and Heidelberg.
- 1966: First State Examination in Law, University of Heidelberg.
- 1966-70: Postgraduate Judicial Service Traineeship (Referendariat) in the Higher Regional Court District of Karlsruhe; Research Assistant at the Max Planck Institute for Comparative Public Law and International Law.
- 1969: Masters of Laws (LL.M.) at McGill University, Montreal, Canada.
- 1970: Second State Examination in Law, Stuttgart.
- 1971-74: Research Assistant at the University of Heidelberg (Professor Dr. K. Doehring).
- 1972: Dr. jur. (Ph.D./doctorate in Law), supervisor: Professor Dr. K. Doehring, University of Heidelberg.
- From 1974: Research Fellow at the Max Planck Institute for Comparative Public Law and International Law.
- 1977: Habilitation (Dr. jur. habil.) in Public and International Law at the University of Heidelberg.
- 1977: Assistant of the Vice-President of the Federal Constitutional Court (Prof. Dr. W. Zeidler) and Senior Legal Officer at the Ministry of Justice, Rheinland Pfalz.
- 1979: Appointment to the chair for Public Law, International Law and European Law at the University of Konstanz.
- 1979-91: Calls to chairs from the Universities of Speyer, St. Gallen, Berlin, Kiel and offer for the position as Institutional Director of Public International Law at Humboldt University, Berlin.
- Since 2000 Member of the Advisory Board of the German Federal Office for Migration and Refugees (Bundesamt für Migration und Flüchtlinge, BAMF).
- 2003: Bundesverdienstkreuz 1.Klasse (Order of merit of the Federal Republic of Germany).
- From 12/2007: Acting Chair of the Federal Advisory Council for Migration and Refugees.
- Since 2010 Professor emeritus at the University of Konstanz and Director of the Research Center for Alien and Asylum Law.
- 1988-92: Judge at the Administrative Court of Justice of Baden-Württemberg.
- Since 1994: Head of the Research Centre "European and International Immigration and Asylum Law”.
- Since 1994: Co-editor of the "Baden-Württembergische Verwaltungsblätter" (Baden-Württemberg Administrative Law Reports); co-editor of the "Zeitschrift für Ausländerrecht und Ausländerpolitik" (Aliens Law and Policy Journal).
- 1998-2002: Chairman of the International Law Association Committee on Refugee Procedures.
- 1999-2006: Member of the German Advisory Council on Science (Wissenschaftsrat).
- 2000-2001: Member of the Governmental Commission on Immigration Reform (Zuwanderungskommission).
- 2007: Honorary Doctorate at the University of St. Gallen.