Jon earned an undergraduate degree from Grinnell College and a Master’s Degree in Agricultural Extension Education from the University of Tennessee. He was active in vegetable production and marketing in East and Middle Tennessee. In 1989 he became Urban Gardening Coordinator for University of Maryland Extension (UME) in Baltimore City where he helped develop community gardens and trained and coordinated Master Gardeners. From 1994-2018 Jon served as State Master Gardener Coordinator and Vegetable & Fruit Specialist at UME’s Home & Garden Information Center. He was appointed Center Director in 2007 and promoted to Principal Agent in 2013. Jon developed the popular University of Maryland Salad Table, trains Master Gardeners, and supports the Grow It Eat It program that teaches and promotes food gardening.