Karl Hofmann is the President and CEO of Population Services International (PSI). The global health organization uses business practices to tackle many of the developing world’s most difficult health challenges. Prior to PSI, Hofmann was an American diplomat, serving as U.S. Ambassador to the Republic of Togo, Executive Secretary of the Department of State, and Deputy Chief of Mission at the U.S. Embassy in France. Hofmann is a director of the U.S. Global Leadership Coalition, an American Academy of Diplomacy member, and President of the TB Alliance’s Stakeholder Association.