The U.S. Ambassador-at-Large for War Crimes Issues advises the United States Secretary of State directly and formulates U.S. policy responses to atrocities committed in areas of conflict and elsewhere throughout the world. As the President’s envoy, this ambassador travels worldwide engaging heads of state and international organizations to build bilateral and international support for U.S. policies. As part of this, the ambassador visits affected countries and uses a range of diplomatic, legal, economic, military, and intelligence tools to help secure peace and stability and build the rule of law. Since September 11, 2001, this ambassador has played a key role in the war on terror and has been the Secretary of State’s lead diplomat in engaging nations regarding their nationals captured in the field of combat. The ambassador also has primary responsibility for policy on Iraqi war crimes.

The first U.S. Ambassador-at-Large for War Crimes Issues was David Scheffer. The second and current ambassador is Pierre-Richard Prosper.