Ronald Johnson was confirmed by the Senate as Ambassador of the United States to the United Mexican States on April 9, 2025. He has served the United States government for over four decades, first as an officer in the U.S. Army, then as a member of the intelligence community, and most recently as the Ambassador of the United States to the Republic of El Salvador. Among his various roles, Ambassador Johnson was the Central Intelligence Agency’s (CIA) Science and Technology Liaison to the U.S. Special Operations Command in Tampa, Florida. Prior to that, he was a Special Advisor to the U.S. Southern Command in Miami, managing collaboration between the Command and the Intelligence Community. He worked on a wide range of regional issues, including refugees, counter-narcotics, counter terrorism, human rights and tropical virus disease control.