Denis was born to Georges Huisman and Marcelle Wogue in the 16th arrondissement of Paris.
He continued his studies at the Faculté des lettres de Paris and at Sciences Po.
In 1961, Huisman founded and became the President of the École française des attachés de presse, which sprouted off multiple branches.
He also founded the Institut supérieur des carrières artistiques in 1963 and the École française du marketing in 1967.
His institutions eventually merged into the École des nouveaux métiers de la communication.