Bachelor's degree, University of California Los Angeles (UCLA); PhD and MPA in International Relations, Woodrow Wilson School, Princeton University. Former: Director, Council on Foreign Relations, Washington DC; Deputy to the US Ambassador to the United Nations; Director, Global and Multilateral Affairs, National Security Council, The White House; Executive Director, Belfer Center for Science and International Affairs, Kennedy School of Government, Harvard University. With the United Nations: since 2004, Assistant Secretary-General, Executive Office of the Secretary-General; principal adviser and leader of Secretary-General initiatives on climate change, energy, global health and food security.