Didier Grumbach was chairman of the Fédération de la Haute Couture et de la Mode for nearly 20 years, stepping down in the summer of 2014.
In 1966, Grumbach co-founded Saint-Laurent Rive Gauche, with Yves Saint-Laurent and Pierre Bergé, going on to help establish Givenchy between 1968 and 1973. During this time he also founded Créateurs & Industriels, which promoted relationships between production companies and designers, from Jean-Paul Gaultier to Thierry Mugler. Grumbach also became chairman of Mugler, until his appointment as chairman of Yves Saint Laurent.
Additionally, Grumbach has served as director of studies to the Institut Français de la Mode and published Histoires de la Mode in 1993. From October 2014 to October 2017, he was president of the Société des Amis de Musée National d'Art Moderne.