Langel succeeds Emmett Davis, who was released from his contract in mid-March after finishing the season 7-23 overall and 4-10 in the Patriot League.
The 51-year-old Davis, who succeeded the late Jack Bruen in 1998, was 165-212 in 13 seasons. Davis led the Raiders to the Patriot League Championship game in 2008, tying a school record for wins in a season with 18 in 2007-08.
Langel and the Owls advanced to the NCAA tournament this season. They defeated Penn State before losing to San Diego State.