In a memo to NBC Universal employees, the 49-year-old TV executive wrote that he and new NBCU CEO Steve Burke "could not agree on an appropriate role" for him in the new corporate structure.
In anticipation of its merger with Comcast, NBC Universal is expected to announce a new structure with former Showtime programmer Bob Greenblatt heading up entertainment for the network and reporting to Burke. Cable heads Bonnie Hammer and Lauren Zalaznick are also expected to report to Burke.
Gaspin had served as chairman of NBC Universal TV entertainment since July 2009.
Gaspin has spent a total of 19 years at NBC Universal. During his tenure, he helped create the successful news magazine Dateline NBC and launched reality hits like The Apprentice and The Biggest Loser. He became president of Bravo in 2002, when he helped mold the cable channel with hits such as Queer Eye for the Straight Guy and Project Runway.