Born in 1930, he earned a law degree at the University of Buenos Aires in his hometown. Camilión first joined the Ministry of Foreign Affairs and Worship as chief of staff under the administration of Arturo Frondizi. Camilión then worked for "Clarín" from 1965 to 1972. After the 1976 Argentine coup d'état, Camilión was appointed the ambassador to Brazil by Jorge Rafael Videla. Videla's successor Roberto Eduardo Viola then selected Camilión to lead the Ministry of Foreign Affairs and Worship. Viola was ousted in another coup, and Camilión became a representative of the United Nations Secretary General. He also served as Minister of Defense from 1993 to 1996 under Carlos Menem.