Mark Gyrion enters his 14th season as an assistant football coach at Illinois College. Gyrion is the father of former Illinois College football player Aaron Gyrion, a 2013 graduate. He works primarily with offensive linemen.

Gyrion is a graduate of De La Salle Institute High School and is employed at Concession Services Inc. as vice president of distribution.

Gyrion and his wife, Kimberly, reside in Lemont. They have four children: Megan, Adam, Aaron and Ryan.