He was born in Belo Horizonte, Minas Gerais, and ordained a priest of the Society of the Divine Word on March 12, 1932.

When he gave his support to a book written by Plinio Corrêa de Oliveira claiming Communist infiltration in the Brazilian Catholic Action, he was sanctioned and sent to Spain in March 1946.

[2] However, he found favor with the Apostolic Nuncio Benedetto Aloisi Masella, who ensured his return to Brazil shortly afterwards.

"[3] In 1962 Sigaud called for "counter-revolutionary combat," especially against Communism, and denounced "the implacable enemy of the Church and Catholic society...the Revolution.

[2] Sigaud started to act in favor of the Brazilian Society for the Defense of Tradition, Family and Property (TFP), founded in 1960 by Plinio Corrêa de Oliveira.