Hamilton attended David W. Carter High School, where he played both at linebacker and defensive end.

In 2008, he enrolled at Dallas County Community College to improve his academic grades, although he didn't play football.

[4] On December 6, he was announced as the Southwestern Athletic Conference (SWAC) co-Defensive Player of the Year along with Grambling State linebacker Cliff Exama.

Hamilton was signed as an undrafted free agent by the Dallas Cowboys after the 2012 NFL draft on April 29.

On August 25, in a preseason game against the St. Louis Rams, Hamilton had a sack on Kellen Clemens.

[15][16] On December 22, 2012, Hamilton was promoted to the active roster after the team placed Jameel McClain on Injured Reserve.

He appeared in the last 5 games, making 12 tackles (2 for loss), 3 pass break ups, and one sack.

On September 8, 2015, he was signed to the practice roster of the Ottawa RedBlacks in the Canadian Football League.