Iván Roberto Sierra Medel is the fifth incumbent that the Mexican Consulate in St. Paul has had since its establishment. He has worked for the Ministry of Foreign Affairs since 1993, has been a career diplomat since the same year and rose to the rank of Ambassador in 2017. Within the Ministry of Foreign Affairs, Ambassador Sierra has worked in the General Directorates for the Pacific and Technical and Scientific Cooperation, as well as in the General Coordination of Advisors, and was an advisor on international affairs at the Presidency of the Republic. From 2019 to 2021, he was the Executive Director of the Institute of Mexicans Abroad (IME). Abroad, Ambassador Sierra has been attached to the Consulate General of Mexico in Sacramento, California, and to the Mexican Embassies in Panama and Malaysia. From 2015 to 2019 he was Ambassador to Guyana, concurrent to CARICOM.

He holds a bachelor's and master's degree in Russian Philology and Letters from Lomonosov Moscow State University, as well as a master's degree in Diplomatic Studies from the Matias Romero Institute of the Mexican Ministry of Foreign Affairs.

He has been a professor at the Dr. José María Luis Mora Research Institute, the Autonomous Technological Institute of Mexico, the Inter-American Center for Social Security Studies, the University of the Americas-Mexico City, and the University of Guadalajara. He has published 30 works on foreign policy and international cooperation.