Sintim played college football for the Virginia Cavaliers and was selected by the New York Giants in the second round of the 2009 NFL draft.
A native of Fairfax County, Virginia, Sintim attended Gar-Field Senior High School, where he made 35 tackles and had three quarterback sacks as a senior and earned first-team all-state and SuperPrep All-American honors.
Sintim broke his left leg playing for Gar-Field's boys basketball team on January 13.
He ranked third on the team with 70 tackles (38 solos) and had eleven sacks and thirteen stops for losses in 2008.
Additionally, he caused a fumble and recovered two others and deflected three passes In 2007, he started all 13 games and had 78 tackles, with 44 being solo and nine going for a loss.