St. Clair was nurtured in the creative world, with an ad man father and Vogue stylist mother. He received a degree in 3D interior design, learning skills that influence his visual style to this day. He started out in commercials as a production assistant, learning on the job and working his way up through the production ranks. St. Clair speaks Italian, Spanish, English, and French, and has worked all across Europe the U.S.
St. Clair has worked with major international brands including Samsung, Coca-Cola, Chevrolet, Gillette, AT&T, Audi, VW, Opel, Mercedes and many others. His work has earned honors from leading international advertising awards including Cannes Lions, Clios, and D&AD.