In July 1944 he entered the diplomatic service as a stenographer - typist Dominican Consulate in Curaçao. Between 1944 and 1975 he held the following positions : Aggregate of the Dominican Legation in Haiti ( 1944-1945 ), Civil Added in Colombia ( 1945-1946 ), Second Secretary of the Dominican Embassy in Colombia (1947 ), Charge d' Affaires Dominican in Chile ( 1948), First Secretary of the Dominican Embassy in Rome ( 1950–51), Honduras ( 1952-1953 ), Haiti (1954–55 ) and Panama ( 1955-1956 ), Director of Business in Peru (1956–57), Chargé d'Affaires in Costa Rica ( 1958-1959 ), Ambassador Extraordinary and Plenipotentiary to Brazil ( 19-62-63 ) and Ambassador Extraordinary and Plenipotentiary to Costa Rica ( 1969-1975 ) . In late 1959, while serving as Chargé d'Affaires in Costa Rica, the Trujillo dictatorship ordered the persecution and murder due to the participation of his cousin José Antonio Fernández Caminero and his brother Abel Fernandez Simó in organizing a resistance movement against Trujillo in the Northeast.