Greg began his 30-year career with the Seattle School District as the Garfield High School Girls Track and Field Head Coach in 1972.

His Garfield teams went on to win eight State Championships, including five consecutive titles from 1981–85, and consistently contended for league and state honors. The 1983 Garfield 800m relay team still holds the 4A State Meet record (1:39.12). While under his leadership, Garfield athletes also set State Meet records in the 400m relay (47.05), 400m dash (54.34), and 100m hurdles (13.71). Over the course of his career, Greg coached 38 individual State Champions.

His coaching excellence was recognized with multiple honors, including Girls Track Coach of the Year by the Washington State Track and Field Coaches Association (1997), KingCo Coach of the Year (2001), and induction into the Washington State Track and Field Coaches Hall of Fame (2003).

Beyond his coaching career, Greg has continued to support high school athletics through his work in the Seattle School District Athletic Office. His lasting impact as a coach and mentor remains an inspiration for Garfield student-athletes and the wider Washington track and field community.