Exposition Internationale des Arts et Techniques dans la Vie Moderne
Aubert was the president of the Chamber of commerce in Côtes-du-Nord from 1930 to 1945. He was close friends with Breton writers Charles Le Goffic and Anatole Le Braz and was a member of the cultural movement Seiz Breur. From 1934, he was president of the committee for the construction and decoration of the Breton pavilion for the 1937 Exposition Internationale des Arts et Techniques dans la Vie Moderne.