Career
In 1974 Hevin earned a vocational certificate as a confectioner/chocolatier and ice cream maker. The next year he began working as an apprentice confectioner at the Intercontinental Hotel. In 1976 Hevin moved to the Nikko hotel as an apprentice confectioner, then as pastry chef until 1988.
That year Hévin opened his first shop ("Le Petit Boulé") on Avenue de la Motte-Picquet, Paris.
He opened another shop in Rue Vavin in 1990 and a tea house in Rue Saint Honoré in 1997. In 2002, he moved into the Japanese market by opening two chocolate-themed bars.
He had previously worked in Japan as head of the Peltier laboratory in Tokyo. Over the years Hévin gradually opened more stores in Paris and Japan along with releasing confectionery products including cheese-flavored chocolate appetizers and chocolate energy bars.
In March 2008, he opened two shops in Hong Kong.