He and his wife, Erica, a biology teacher at Thomas Worthington High School, met while teaching outdoor leadership and backpacking courses for the Cornell Outdoor Education Program while in graduate school. Before joining the faculty at Ohio State, Greg was co-founder and director of the National Wildlife Federation’s (NWF) NatureLink program, and served as a director and instructor for several years at NWF’s Eastern and Western Teen Adventure and Wildlife Camp programs; he also co-founded an outdoor program while at the Yale Divinity School, and taught a wide range of courses for the Cornell Outdoor Education program as an undergraduate and graduate student.