[2] He served as the co-Cabinet Secretary to Marshal Philippe Pétain from July 1941 to December 1942, alongside Henry du Moulin de Labarthète.

[2] De Saivre was in charge of French Algerian affairs in the cabinet; from July 1942 to December 1942, he was assisted by Georges Demay.

[1] He was arrested by the Nazis on December 24, 1942, and jailed at the Château du Hâ, followed by the Fresnes Prison.

[1] Shortly after the war, he became a founding member of the Association for the Defence of the Memory of Marshal Pétain[1] and later became General Secretary of the Petainist political party Union of Independent and Republican Nationals (UNIR).

[1] He served as a member of the National Assembly for Oran, French Algeria from June 17, 1951, to December 1, 1955.