A career diplomat, Mark Coolidge Johnson, has assumed the role of Chargé d’Affaires at Mission Mexico as of January 2025. Johnson is a member of the Senior Foreign Service, class of Minister-Counselor. He also holds the position of Deputy Chief of Mission since July 2023.
In his current role, Johnson oversees 40 agencies and 3,500 staff members to advance U.S. strategic goals with Mexico in areas such as security—particularly in combating fentanyl trafficking—migration, and trade. Before this appointment, he served as Deputy Executive Secretary from 2021 to 2023 in the office of the Secretary of State. During this period, he managed internal coordination concerning Western Hemisphere, Middle Eastern, and African affairs and worked with various bureaus including Strategic Policy and Legal.
Johnson's previous experience includes being Director of Andean Affairs from 2019 to 2021, where he was responsible for U.S. policy implementation for Colombia, Peru, Ecuador, and Bolivia. From 2016 to 2019, he was Deputy Chief of Mission at the U.S. Embassy in San Salvador focusing on migration issues and counter-narcotics efforts among other responsibilities.
His earlier roles include serving as Spokesman at the U.S. Embassy in Mexico City and Economic Section Chief at the U.S. Consulate General in Jerusalem. Additionally, he has held positions in London running a counter-terrorist finance group and served as Deputy Political/Economic Counselor in Sofia, Bulgaria.
Mark Coolidge Johnson joined the Department of State in 1993 after working for New York State government. He holds a Bachelor’s degree from Boston College and a Juris Doctorate from American University.
Johnson is married with three children.