Sarah Holewinski focuses on the responsible use of force in armed conflict. She was senior advisor to the Chairman’s Action Group (CAG) and the Transregional Threats Coordination Cell (T2C2) on The Joint Staff at the U.S. Department of Defense. She was also a senior fellow with the Center for a New American Security during that time. Previously, Sarah served as Ambassador Samantha Power's deputy chief of staff for policy at the US Mission to the United Nations. Sarah served for nearly a decade as executive director of Center for Civilians in Conflict, leading the organization's efforts to advise warring parties on civilian harm in Iraq, Afghanistan, Burma, Somalia, Libya, and elsewhere. Sarah was named in the top 100 Most Influential People in Armed Violence Reduction by Action on Armed Violence (AOAV) in 2014, and in 2015, received the Truman Award for Extraordinary Impact. Sarah was a member of the Clinton Administration's White House AIDS Policy team and senior associate of West Wing Writers, a firm of former White House speechwriters. She consulted for Human Rights Watch, the Clinton Foundation in Rwanda, Ford Foundation, and the International Committee of the Red Cross. She holds a Bachelor's from Georgetown in political theory and a Master's from Columbia in security policy. She is a member of the Council of Foreign Relations.