[1] His first post as a Foreign Service Officer was to the United States Embassy in Mexico[1] With the end of World War II, Holland left the foreign service in 1945 and resumed the private practice of law.
[2] In 1954, President of the United States Dwight D. Eisenhower named Holland Assistant Secretary of State for Inter-American Affairs and, after Senate confirmation, Holland held this post from March 2, 1954 until September 13, 1956.
[1] In this capacity, he was assistant chief of the United States delegation at the tenth Pan-American Conference, held in Caracas in March 1954.
[1] He later headed the U.S. delegation to the Inter-American Conference on resources of the sea.
[1] Holland served as international affairs adviser to the Republican Party during the 1956 election campaign.