While they were living in Linz Marie Hohenheisel began working to improve living conditions for women. She concerned herself with wage levels and working conditions and also demanded better status and recognition by society for the work undertaken by women as wives and mothers. From her published articles and lectures/speeches from those years it is evident that her over-riding goal was legislative backing for the equal standing of men and women in the workplace and in society. In Vienna, supported by the pioneering feminist activist Marianne Hainisch, from 1926 she focused on the campaign to introduce a US-style Mother's Day to the country. In 1928 she became chair of the Austrian Mothers' Day committee. Three years later she also took on the presidency of the , a position she retained till the League's dissolution in 1938 following the 1938 merger (""Anschluss"") of Austria into Nazi Germany.