Mason is Professor Emeritus in the department of Communication Design at New York City College of Technology/CUNY.  Prior to his career as a design educator, he served as Director of Graphic Design for New York’s Parks, Recreation & Cultural Affairs Administration (PRCA). In 1969 he proposed that the three major broadcast networks televise the moon landing by erecting giant screens in Central Park’s Sheep Meadow. MoonSite, the poster he designed for the event, was included in Images of an Era: The American Poster 1945–1975, the Smithsonian Institution’s catalog and traveling exhibit. He later maintained a graphic design practice for clients including Citicorp, the New York State Department of Law and Friends of Central Park.

Mason earned a BFA from Cooper Union and an MFA from Hunter College/CUNY. He lives in Kingston, New York with his wife, the artist Jenny Snider.