In 2009, he was appointed Ambassador to the Federative Republic of Brazil.

He was appointed chargé d'affaires to the Republic of Texas on June 11, 1844.

He was then appointed as United States Ambassador to the Republic of Rwanda September 30, 1982.

He was appointed Ambassador to the Republic of Azerbaijan in July 2008.

Five years later he was appointed ambassador to the Central African Republic.

Anderson was appointed as the first United States Minister to the Republic of Colombia on January 27, 1823.

He was appointed minister-resident and consul-general to the Republic of Haiti (1889-1891).

He also appointed Ambassador to the Republic of Korea.

In 1946 he was appointed ambassador to the Republic of China.

In 2007 he was appointed Nigeria's High Commissioner to the Republic of South Africa.