Mark Goodridge, with his wife, Sue, started Goodridges Screen Printing in Maine, USA in 1982. They printed on a wide variety of garments as well as signs, posters, and bumper stickers. Eventually selling his screenprinting business, Mark became the editor of now-defunct Screenplay Magazine, a textile screen printing trade magazine. Later he served as the marketing manager for an ink manufacturer. Mark has written many articles on a wide variety of screen printing topics and is the author of Pricing for Profits, Screenmaking for Screen Printers, and Selling Garment Graphics: Sales and Marketing for Textile Screen Printers

He has also presented many well-received seminars at screen printing conventions and open houses.