[7] In 2015 Chapman was appointed United States Ambassador to Ecuador by President Barack Obama[8] and confirmed by the U.S.

[9] Chapman presented his credentials as United States Ambassador to Ecuador on April 14, 2016, and served until June 8, 2019.

[10] On October 30, 2019, President Donald Trump nominated Chapman to become United States Ambassador to Brazil.

[13] In June 2021, citing personal reasons, Chapman announced his intention to retire and to spend the next thirty days continuing to strengthen relations between the United States and Brazil.

[14][15] On June 9, 2021, Todd Chapman communicated to US President Joe Biden his request for retirement from the State Department service for personal reasons, ending a career spanning three decades.