 Severs turned professional in 2005 when he with the Harrisburg City Islanders of the USL Second Division and was named USL2 Rookie of the Year.Severs moved on to the Rochester Rhinos for 2006, but the Islanders brought him back for a five-game loan stint over which he scored four goals.He was more of a presence for Rochester in 2007, scoring 3 goals and 7 points over 14 appearances, but still found time for another productive loan spell in Harrisburg (3 goals, 8 points in five games) as he helped the Islanders on their championship run.