In 1935, Ramondt-Hirschmann took part in the protest against the group arrests of political dissidents by the Nazis. Between 1935 and 1937, she served as one of the three international co-chairs of the WILPF. During 1936, she served on the Supervisory Board of the Central Peace Bureau and began her participation in collecting relief funds for those in need due to the Spanish Civil War. In 1938, she returned to The Hague and lived there until the German invasion of the Netherlands, when she returned to Hilversum to live with her daughter and retired from peace work.