Paul's current life in advertising began in Toronto in 1981, when he left the Creative Directorship of a large international ad agency to persue the carefree life of a freelancer. He has since produced a whole lot of effective and award-winning work for a diverse clientele. He has also sat on the judging panels of the Marketing Magazine Awards, and the Advertising And Design Club of Canada.

Paul's company, Grissom & Friends, is currently providing free-lance creative direction to anyone who will listen, but particularly for the Kazoo Advertising Partnership, a virtual agency group composed of some old friends in the agency business who share his somewhat irreverent and non-traditional approach.