Esteban Moctezuma, current head of the SEP, will be the next Mexican Ambassador to the United States Posted byEntrepreneur en Español December 16, 2020 Leave a comment on Esteban Moctezuma, current head of the SEP, will be the next Mexican Ambassador to the United States The Secretary of Education will fill the vacancy left by the current ambassador, Martha Bárcena, amid the change of administration in the neighboring country.