He also becomes the school's fourth linebacker of the class, joining Ponte Vedra's (Fla.) Joe Carter, Ocean Lakes' (Va.) Massadiq Walton and Kempsville's (Va.) Kyron Speller, and ECU's ninth defensive player.
Tillman was among the handful of prospects that visited ECU on the final weekend prior to Wednesday's National Signing Day. Pirates' outside linebackers coach Duane Price was responsible for the bulk of Tillman's recruitment. Associate coach John Wiley played a role as well.
He has been highly decorated during his career at Miller Grove. Most recently, he was named Georgia's 6-AAAAA all-region defensive player of the year.
Tillman also holds offers from several other teams, including Marshall, Appalachian State and Georgia.
Continue to follow us here or on Twitter (@InsideECUSports) for more on Tillman's commitment as well as up-to-date updates on ECU recruiting leading up to signing day.