Clark served for nine non-consecutive seasons as the head football coach at Catholic University of America, where he compiled a 58–32–1 record and a .643 winning percentage.
He returned to the Washington metropolitan area to serve as athletic director and head football coach at Bishop McNamara High School in Forestville, Maryland from 1988 to 1994.
[5] After three seasons with the Tribe, Clark was hired by Scott Wachenheim as the defensive coordinator of the Virginia Military Institute.
[7] In March 2022, Clark was hired as the assistant head football coach at Hampden–Sydney College in Hampden Sydney, Virginia.
The move reunited Clark with long-time friend Marty Favret, whom he coached with at Catholic University.