Ian Johnstone is a Professor of International Law at Fletcher School of Law and Diplomacy, Tufts University. He is also a Senior Fellow at the Center on International Cooperation, New York University. Prior to joining the Fletcher School in 2000, he held various positions in the United Nations Secretariat, including five years as political officer in the Office of the Secretary-General. He also served in the Office of the Under-Secretary-General for Peacekeeping Operations, and in the Office of the Legal Counsel. His recent publications include "The Use of Force" in The United Nations and Nuclear Orders (2009); "Normative evolution at the United Nations" in Cooperating for Peace and Security (2009); The United States and Contemporary Peace Operations: A Double-Edged Sword? (2008); "Legislation and Adjudication in the UN Security Council: Bringing down the Deliberative Deficit", American Journal of International Law (2008); "Law-making through the operational activities of international organizations", George Washington International Law Review (2008); "The Secretary-General as norm entrepreneur," in Secretary or General? The Role of the UN Secretary-General in World Politics (2007); "The plea of necessity in international law: humanitarian intervention and counter-terrorism", Columbia Journal of Transnational Law (2005).
From 2005-2007 he was the Volume Editor and Lead Scholar of the first two volumes of the Center on International Cooperation's Annual Review of Global Peace Operations. Professor Johnstone is a regular consultant to the United Nations on political, peacekeeping and related issues. A citizen of Canada but long-time resident of the US, he holds an LL.M degree from Columbia University and JD and BA degrees from the University of Toronto.