The move was announced Tuesday.
Frazier replaces Jeff Compher at NIU. Compher left to take the athletic director’s job at East Carolina.
Frazier, who has been at Wisconsin since 2007, was also a finalist to become Rutgers athletic director before the school hired Julie Hermann.
Source: Associated PressNIU Hires Wisconsin's Frazier As AD by Jazmyne Hankerson