| 1966-1967 | Studies in General Linguistics, supplementary examination in Ancient Greek |
| 1967-1971 | Studies in Socio-Economics (Mag.rer.soc.oec.), University of Vienna |
| 1969-1973 | Studies in Law (Mag. et Dr.jur.), University of Vienna |
| 1974-1988 | University Assistant and Senior Assistant, Institute for Constitutional and Administrative Law, Vienna School of Economics |
| 1976-2006 | Lecturer/Visiting Professor, Public Law, Vienna School of Economics |
| 1985-1994 | Civil Servant, Constitutional Department, Austrian Federal Chancellery |
| Representative ad litem before the Verfassungsgerichtshof (Constitutional Court) in proceedings for review of the constitutionality of federal laws |
| 1985-1989 | Member, Council of Europe's Steering Committee on Legal Cooperation (CDCJ) |
| 1989-1994 | Head, Department of European Integration Legal Matters and International Economic Law Matters, Federal Chancellery |
| Coordinator responsible for the adaptation of Austrian federal law to Community law; preparation of constitutional legislation in EU matters |
| | Since 1992 Member, Faculty of EURAS European Advanced Studies and EUROJUS, Danube University, Krems |
| | Since 1993 Reader, University of Vienna |
| 1993-1994 | Member, Working Party on CELEX, Austrian Legal Information System |
| | Since 1995 Judge, General Court of the European Union (GC) |
| 1997 | /1998 President of Chamber at the General Court |
| | Since 2000 Part-time Lecturer, University of Luxembourg (and Institut universitaire international, Luxembourg) |
| 2000 | /2001 President of Chamber, General Court |
| | Since 2001 Reader, Leopold-Franzens-Universität Innsbruck |
| | Since 2002 Member, MEIR Specialist Advisory Council of the European Academy, Bozen |
| | Since 2003 Member, Faculty of Master of Laws in Transnational Business Practice, University of Salzburg |
| 2003 | /2004 President of Chamber, General Court |
| | Since 2004 Member (from 2008: Vice-Chairman), Board of Trustees, European Law Academy (ERA), Trier |
| 2006 | /2007 Chairman, Procedural Committee, General Court |
| | Since 2007 President of Chamber, General Court |
| | Since 2008 Honorary Professor, Law Faculty, University of Vienna |
| | Since 2009 Member, Editorial Board, "European State Aid Law Quarterly" (EStAL |
| 1963-1968 | Universität Wien, Rechtsfakultät |
| 1968 | Promotion zum Dr. iur. |
| 1968-1970 | Diplomatische Akademie in Wien |
| 1970 | Eintritt in das Bundesministerium für auswärtige Angelegenheiten |
| 1970-1972 | Völkerrechtsbüro |
| 1972-1973 | Legationssekretär an der österreichischen Delegation in Berlin (West) |
| 1973-1978 | Botschaftssekretär an der österreichischen Botschaft in Washington |
| 1978-1981 | Völkerrechtsbüro |
| 1981-1984 | Gesandter-Botschaftsrat an der österreichischen Botschaft in Belgrad |
| 1984-1987 | Gesandter-Botschaftsrat an der österreichischen Botschaft in Kairo |
| 1987-1992 | Gesandter, stellvertretender Leiter des Völkerrechtsbüros, Leiter der Abteilung "Allgemeines Völkerrecht" |
| 1992-1996 | Botschafter, Ständiger Vertreter Österreichs beim Europarat (1993 Vorsitzender des Ministerdelegiertenkomitees) |
| 1996-1999 | Leiter der Abteilung für Amerika im Bundesministerium für auswärtige Angelegenheiten (1998 Leiter der Task Force für transatlantische Beziehungen während des österreichischen EU-Vorsitzes) |
| 1999-2005 | Leiter des Völkerrechtsbüros |
| 2002-2005 | Stellvertretender Generalsekretär |
| 2005-2008 | Staatssekretär im Bundesministerium für europäische und internationale Angelegenheiten |
| | Seit 2009 Direktor, Diplomatische Akademie, Wien |
