| 1977 | Law Studies in Vienna (Dr. iur.) |
| 1977-1978 | Postgraduate-Studies, College of Europe, Bruges |
| 1978 | Diploma of The Hague Academy of International Law, The Hague |
| 1979 | Joined the Austrian Diplomatic Service |
| 1982-1986 | Austrian Mission to the European Communities, Brussels |
| 1986-1990 | Austrian Embassy, Moscow |
| 1991-1993 | Private Office of the Austrian Foreign Minister, Vienna |
| 1993-1995 | Deputy Head of Cabinet of Foreign Ministers Mock and Schüssel, Vienna |
| 1995-1999 | Director for Security Policy and Policy Planning, Austrian Foreign Ministry, Vienna |
| 1996-1999 | Deputy Political Director, Austrian Foreign Ministry, Vienna |
| 1999-2003 | Ambassador of Austria to Belgium and Head of the Austrian Mission to NATO, Brussels |
| 2002-2004 | Special Representative of the Austrian Foreign Minister for the Western Balkans |
| 2003-2004 | Representative of the Federal Chancellor of Austria in the Commission on the Reform of the Austrian Armed Forces, Vienna |
| 2003-2008 | Political Director (Director General for Political Affairs) of the Austrian Foreign Ministry, Vienna |
| 2008-2011 | Permanent Representative of Austria to the United Nations, New York |
| 2009-2010 | Also represented Austria on the United Nations Security Council, New York (President of the Security Council in November 2009) |
| 2011 | Vice-President of the 66th General Assembly of the UN, New York |
| 2011-2015 | Ambassador, (Head of the Delegation) of the European Union to the United Nations, New York |
| since 2015 | Managing Director for Europe and Central Asia, European External Action Service, Brussels |
| | Visiting Professor, College of Europe, Bruges and Natolin |
| | Brahma Chellaney is Professor of Strategic Studies at the New Delhi-based Center for Policy Research, an independent, privately funded think-tank. |
| | Until January 2000, Professor Chellaney was an adviser to India's National Security Council, serving as convenor of the External Security Group of the National Security Advisory Board, as well as member of the Board's Nuclear Doctrine Group. |
| | He holds a Ph.D. in arms control. |
| | As specialist on international security and arms control issues, Professor Chellaney has held appointments at the Harvard University, the Brookings Institution, the Johns Hopkins University's School of Advanced International Studies and the Australian National University. |
| 1980 | Dr. iur. Johannes Kepler University Linz |
| 1998 | Ph.D. in International Relations, The Graduate Institute of International Studies, University of Geneva |
| 1979-1980 | OLT d.Res., Special Assistant to the Commander, Austrian National Defense Academy, Vienna |
| 1981-1982 | Assistant to Professor Dusan Sidjanski, Department of Political Science, University of Geneva |
| 1981-1984 | Temporary Collaborator, ORF-Austrian Broadcasting Corporation , Studio at the United Nations, Geneva |
| 1982-1985 | Senior Research Assistant to Professor Curt Gasteyger, The Graduate Institute of International Studies, Geneva |
| 1985 | Visiting Scholar, The Fletcher School of Law and Diplomacy, Tufts University, Medford, MA |
| 1985-1987 | Research Fellow, Center for Science and International Affairs, Kennedy School of Government, Harvard University, Cambridge, MA |
| 1986-1987 | Nonresident Tutor at Eliot House, Harvard College, Cambridge, MA |
| 1987-1989 | Visiting Fellow, Center of International Studies, Princeton University, Princeton, NJ |
| 1989 | Founding Chair, Liechtenstein Colloquium, LCM - A private diplomacy forum |
| 1988-1991 | Lecturer in Politics, Department of Politics, Princeton University, Princeton, NJ |
| 1989-1992 | Member, "Working Group Europe 1992," The Council on Foreign Relations, New York |
| 1991-1998 | Member, Team Europe of the Commission of the European Union, Washington, D.C. |
| since 1992 | Instructor in Politics and International Affairs, Woodrow Wilson School of Public and International Affairs, Princeton University, Princeton, NJ |
| 1995-2000 | Founder, Liechtenstein Research Program on Self-Determination at Princeton University, LRPSD |
| since 2000 | Founding Director, Liechtenstein Institute on Self-Determination at Princeton University, LISD, Princeton, NJ |
