 He was one of the founders of the Brazilian Socialist Party in 1947, alongside Rubem Braga, Joel Silveira, and others.He was also Chief of Staff of the Presidency and Minister of Foreign Affairs in 1963.He held the position of Prosecutor General of the Republic between September 1961 and January 1962, and of Justice of the Supreme Federal Court between September 1963 and January 1969, when he was forced to retire because of the Institutional Act No.