The winningest coach in Franklin & Marshall College volleyball history, Coulson returned in the fall of 2003 to serve as an assistant coach.

He served for 12 years as head coach of the Diplomats (1986-89; 1993-2000) guiding F&M to a 251-152 (.623 winning percentage) record and six trips to the NCAA Division III Championship Tournament. In addition, he coached Franklin & Marshall to the 1993, 1994, 1999 and 2000 Centennial Conference Championships.

Coulson graduated from Hempfield High School in 1966 and Lehigh University in 1971 with a bachelor's degree in psychology (engineering minor).

Prior to his Franklin & Marshall coaching career, he was an active player and coach for ten years on United States Volleyball Association (USVBA) teams in the Washington, D.C. and Lancaster areas.