SID KESSLER, one of North America's top advertising executives, is a mentor and investor in new companies. He was the principal of the major advertising companies Kessler Productio...view moreSID KESSLER, one of North America's top advertising executives, is a mentor and investor in new companies. He was the principal of the major advertising companies Kessler Productions, Kessler Music Inc., The Air Company, and Supercorp (with John Labatt Ltd.).view less