​Leonian's advertising photography complemented campaigns ​for General Foods, General Motors, General Electric, Johnson & Johnson, Niagara Mohawk, Waterford, Oneida, Lucky Strike, Dupont, Allegheny Airlines, United Fruit, Springmaid, NY Times, Westinghouse, Pepsi, Playtex, AT&T, US Army, Nabisco, Polident, Mountain Dew, Alka Seltzer, L'Eggs, Jamaica Air, Loestrin, IBM, Salem, Avis, Earth Shoes, Minolta, Georgia Pacific, TWA, Sears, Tender Vittles, Business Week, Kodak, Adidas, Bausch & Lomb, Pfizer, Upjohn, Mennan, Roche, Wesclox, Alcon, Squibb, Medical World News, St. Regis Paper, Ansco, Carter Carburetor, Emery Air Freight, the NYS Racing Association and the California Milk Producers Advisory Board. 

Sears: Ted Williams advertising photo by Phillip Leonian

Georgia-Pacific 1979 photo by Phillip Leonian

Georgia-Pacific 1979 photo by Phillip Leonian

Georgia-Pacific 1979 photo by Phillip Leonian

Kidding the College Girl? advertising photo by Phillip Leonian

AT&T photo by Phillip Leonian

"Every Body Needs Milk" advertising photo by Phillip Leonian

Hubbell 1970 photo by Phillip Leonian

Delco 1969 photo by Phillip Leonian

AMX 1968 photo by Phillip Leonian

Citibank 1973 photo by Phillip Leonian