When asked if his plan was to return to UNC after his JuCo stint, Williamson replied: "If they offer again, yes."
A school official confirmed Williamson's decision to transfer on Monday afternoon.
Williamson committed to the Butch Davis coaching staff in May of 2011, maintaining his commitment through the two coaching changes that followed over the next seven months.
The Durham, N.C. native played linebacker during his redshirt freshman season in 2012, but after adding 40 pounds in the offseason, he was moved to defensive end this past spring.
Williamson played on the third team defensive unit during 2013 spring practice.