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.

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.