Orr was the head coach at Bowling Green State University from 2007 to 2014[1] and at Seton Hall from 2001 until 2006.

He was also an assistant coach at Georgetown under his former New York Knicks teammate Patrick Ewing.

[4] The duo was named so after the student newspaper The Daily Orange ran a caricature of them heading up the basketball court in tuxedos and top hats.

Then, in 1994, he began serving under Pete Gillen at Providence and soon he was an assistant under Jim Boeheim and the Syracuse Orangemen.

In his first year in the Big East Conference, Orr went 12–18, but was noted for playing Duke very close in the Maui Invitational.

By his fifth season at Seton Hall, Orr had led the Pirates to two NCAA Tournaments in three years.

As the MAC regular season champion, Bowling Green received an automatic bid to the 2009 National Invitation Tournament.

Bowling Green made a strong comeback, but fell short, losing to Creighton 73–71 in their first-round game.

Orr was named the MAC Coach of the Year for Bowling Green's performance during the 2008–09 season.