Karl Costello has been the Athletic Director at Niles North High School for the past nine years. Prior to his tenure as the chief athletic administrator at Niles North, Karl coached high school basketball for over 25 years at the following schools: St. Benedict (Chicago), Gordon Technical Institute (Chicago), Crete-Monee High School (Crete, Ill.), Loyola Academy (Wilmette, Ill.) and Addison Trail High School (Addison, Ill.).