From 1942-43, during World War II, Harold Courlander served as a historian for the Air Transport Command for the Douglas Aircraft Project 19 in Gura, Eritrea. Courlander then worked as a writer and editor for the Office of War Information in New York City and Bombay, India, from 1943-46. From 1946 until 1956, he worked as a news writer and news analyst for the Voice of America in New York City. He was an information specialist and speech writer for the U.S. Mission to the United Nations from 1956–1957. He was a writer and editor for "The United Nations Review" from 1957–1960. From 1960 until 1974, Courlander was African specialist, Caribbean specialist, feature writer, and senior news analyst for the Voice of America in Washington, D.C..