After graduation, he returned to Lafayette to teach at the Industrial Institute, including serving as its head football coach for at least one game, an 11-5 victory over Crowley in 1907.

[4] Caffery launched his career of international diplomacy in 1911 when he entered the Foreign Service as second secretary of the legation in Caracas in 1911 during the William Howard Taft administration.

[2] He traveled to Iran (then named Persia) in 1916, to Paris after World War I with President Wilson’s peacemakers, then to Washington, D.C., to arrange details for visits by the King of Belgium and the Prince of Wales.

Tired of terrible working conditions and very little wages (workers were paid in United Fruit Company store credit), banana farmers went on strike in protest.

In order to protect the interests of the United Fruit Company, Caffery reported to U.S. Secretary of State Frank Billings Kellogg that leaders of the strike would be immediately arrested and sent to prison in nearby Cartagena.

The revolution was led by a military junta headed by Mohammed Naguib and Gamal Abdel Nasser who demanded the departure of the British from the Suez Canal zone.

"[4] In 1954, the British agreed to evacuate their military bases in the Canal Zone until the summer of 1956, but were given the right to return in case of an attack by an outside power against an Arab League member state or Turkey.

[12] In total, he worked 43 years in foreign service under eight U.S. presidents: Taft, Wilson, Harding, Coolidge, Hoover, Roosevelt, Truman, and Eisenhower.

[4] He retired with his wife in 1955 to reside in Rome, where he was an honorary Papal gentleman to Popes Pius XII, John XXIII, and Paul VI.