As part of this, the Ambassador visits affected countries and engages a range of diplomatic, legal, economic, military, and intelligence tools to help secure peace and stability and build the rule of law.

As the head of the Office of Global Criminal Justice, this Ambassador also has the rank of Assistant Secretary.

[1][2] David Scheffer served as the first U.S. Ambassador-at-Large for War Crimes Issues (1997–2001).

[3] In July 2009, U.S. President Barack Obama nominated Stephen Rapp, a former United States Attorney and prosecutor for the United Nations Special Court for Sierra Leone, to succeed John Clint Williamson as Ambassador-at-Large for War Crimes Issues.

The Senate confirmed him on September 8, 2009, making Rapp the fourth person to hold the title.