Over the past 21 years, Dr. Stephen Tull has worked within the United Nations (UN) system, principally responsible for coordinating humanitarian action, managing operations, and developing policy. He has served the UN in Peacekeeping, Human Rights, Humanitarian Affairs, and Development in former Yugoslavia, Rwanda, Afghanistan, the Russian Federation, Kazakhstan, and Chad. For the past six years he has been the UN Resident Coordinator and Humanitarian Coordinator in Chad. Prior to this role, Dr. Tull served as the UN Resident Coordinator in Kazakhstan, the Chief in the Officer of the Director for the UN Office for the Coordination of Humanitarian Affairs, the Head of Office for the UN OCHA Russian Federation Country Office, and a Political Adviser for the UN Human Rights Operation in Rwanda.