Jack Greig grew up in Dix Hills on Long Island NY. Played his youth hockey for PAL (Police Athletic League). Greig played 3 seasons of Suffolk County Varsity High School Hockey for Half Hollow Hills Thunderbirds HHH (1988–90). Greig was a 2 time All Star & All Suffolk County Player. Greig also played 2 seasons for the Long Island Royals JR B before moving off Long Island to further his hockey career. During his time with the LI Royals they were Keegan Cup Champs & played in 2 USA JR B National Championships 1990 (Royal Oak MI) & 1991 (Rochester NY).