Theriot is a career member of the
Senior Foreign Service with the rank of minister-counselor. Currently, she serves as the U.S. ambassador to Guyana. Just prior, she was principal officer in
Karachi, Pakistan. She has also served as deputy chief of mission at the U.S. Embassy in
Port-au-Prince, Haiti. Theriot served as immigration and visa security director at the
White House National Security Council. Before this, she served as a senior advisor to the deputy assistant secretary of state for overseas citizens services in the
Bureau of Consular Affairs. Theriot also served as political counselor at the U.S. Embassy in
Kabul, Afghanistan, along with principal officer in
Casablanca, Morocco as well as the Bureau of Consular Affairs’ supervisory regional consular officer in
Frankfurt, Germany. Other overseas assignments include internal politics chief in
Islamabad, Pakistan; consul general in
Barbados and the
Eastern Caribbean; deputy consular chief in
Baghdad, Iraq; non-immigrant visa chief in
Montreal, Canada; consular officer in
Paris, France; and information officer in
Lagos, Nigeria. Her nomination was not acted upon for the rest of the year and was returned to Biden on January 3, 2023. President Biden renominated Theriot the next day. Hearings on her nomination were held before the
Senate Foreign Relations Committee on March 30, 2023. The committee favorably reported her nomination on May 3, 2023. On July 27, 2023, her nomination was confirmed by the Senate by
voice vote. Theriot presented her credentials to President
Irfaan Ali on October 23, 2023. Theriot responded to the announcement of the launch of
Azruddin Mohamed's presidential campaign for the
2025 Guyana elections, warning that the US would cut economic ties with a potential Mohamed administration and that the US "would have to make sure that we didn't work with him specifically". ==Awards and recognitions==