For her aid to Jews in Brittany during the Second World War, she as well as her parents were recognised as Righteous Among the Nations by Yad Vashem.

[2][4] During the Second World War, Beaumanoir was a medical student and a clandestine militant member of the French Communist Party (PCF).

One day in June 1944, these friends informed her that there would be a raid the following night in the 13th arrondissement of Paris, and asked her to warn a woman called Victoria, who was hiding a Jewish family.

Beaumanoir was not in Paris at the time; when she returned, she collected the youths from their temporary hiding place and took them to live with her parents at their home in Dinan.

[5] In Dinan, her father, Jean Beaumanoir, was interrogated by the police, who suspected that he was a member of the Resistance, but was released for lack of evidence.

[2] After the Évian Accords ended the Algerian War, Beaumanoir worked for the Minister of Health in the government of Ahmed Ben Bella.