François Demachy is a fine fragrance perfumer who works for Christian Dior. He was born in 1949 in Cannes, France and learned perfumery as a trainee in the Grasse perfume factories.

In 1971 he worked in the Charabot perfume house, and in 2006 joined Dior as an in-house perfumer. His father, a pharmacist, created his own cologne called Eau de Grasse Imperiale. Edmond Roudnitska, close friend of Dior and master perfumer was a customer of François Demachy's father.