In addition, Zaid has designed several billboards for 7-Up, and hundreds of logos, including Miami Beach Sports, Upper Crust Sandwich Shop, The Dawg House, Florida Bay Mortgage, The Conch Farm, Chateau Le Chat, and The Market Company, and packaging for Kleenex tissues, Celestial Seasonings Herb Teas, Florence Gunnarson Perfumed Essentials, Captain Condom, Tropical Delicious, Tropic Lines (Jamaica), We Take The Cake, and Granny Bear Honey.
Following his return to Canada, he worked as a freelance graphic designer and illustrator and as a studio art director (Colopy Associates) in Toronto (1963–66).
His work appeared in the exhibition, 'The Push Pin Style' in the Museum of Decorative Arts of the Louvre, Paris, France, as well as numerous cities in Europe, Brazil and Japan (1970–72).
He returned to Manhattan in (1987–92) where he pursued his career illustrating publications, wrote and designed a book "Wish You Were Here" (Crown Publishing).
In 2014, he traveled to San Miguel de Allende, Mexico, to develop a line of colorful housewares and complete his forthcoming illustrated children's book, "The Little Square ABC Of Things To Be."