Studies law at the University of Aix-en-Provence. Studied painting in Paris, works as a graphic designer. 1947: opens his studio. Co-founder of the U + O (Urbi et Orbi) advertising agency in Paris. Art consultant for the Fonderie Olive type foundry in Marseille (until 1959). 1968: designs the symbols for the Winter Olympics in Grenoble. 1972: founds his agency Excoffon Conseil. Excoffon produced numerous poster designs for Air France, Bally shoes, Dunlop, Sandoz and SNCF, among others and has contributed to the magazines "Le Courier Graphique", "Typographica", "Esthétique Industrielle" and "Techniques Graphiques".
Fonts: Chambord (1945), Banco® (1951), Mistral® (1953), Choc™ (1955), Diane (1956), Calypso (1958), Antique Olive™ (1962–66).
* TYPOGRAPHY – An Encyclopedic Survey of Type Design and Techniques Throughout History by Friedrich Friedl, Nicolaus Ott (Editor), Bernard Stein, published by Könemann Verlagsgesellschaft mbH.