Miller served as a
United States Marine Corps officer where served on active duty until 1984 and in the reserves until 1992 where he took part in the
Persian Gulf War. While posted in Malaysia, Miller took part in the investigation of an ambush in eastern Indonesia that saw two U.S. schoolteachers murdered. He was the Consul General of the United States to South Africa in
Johannesburg from 2011 to 2014. Starting December 18, 2014, Miller served as the United States Ambassador to Botswana. Miller was awarded the
Award for Heroism from the Diplomatic Security Service, the
Shield of Bravery from the
Federal Bureau of Investigation (FBI), and the
Secretary's Distinguished Service Award from Secretary of State
Antony Blinken on May 20, 2022. He is fluent in
Indonesian, French, and Spanish. In July 2018, Miller was nominated by President
Donald Trump to be the next
U.S. Ambassador to Bangladesh. During the
2018 Bangladesh election violence he expressed his concern and played a crucial role in restoring peace and end violence. Miller left Bangladesh on January 21, 2022. ==Personal life==