Sack served in the United States Diplomatic Service from September 1933 until he resigned his post in order to associate with Schenley. In 1934, during Costa Rica's Great Banana Strike, the United Fruit Company attempted to secure Sack's help in requesting United States intervention in Costa Rica to end the strike. Sack refused as he was not in favour of meddling in the affairs of other sovereign nations, and also didn't believe President Roosevelt would be in favour of such action, citing the Good Neighbor Policy. After his resignation, Edward Albright was appointed to replace him; but after Albright's death, William H. Hornibrook ultimately became the new minister. Later, he started a public relations firm.
