Bob Okun, the longtime head of NBCUniversal’s Washington lobbying office, is leaving to start his own government relations firm.

Okun, who has been with the company for 16 years, will stay through the end of June and launch The “O” Team on July 1. Comcast and NBCU will be his first clients.

Shortly after Comcast obtained regulatory approval to acquire a controlling stake in NBCU, it named Kyle McSlarrow, most recently the chief of the National Cable & Telecommunications Assn., as president of Comcast/NBCU government affairs operations in Washington. Comcast says a search will be conducted for Okun’s successor.

Before entering the private sector, Okun worked for then-House Republican leader Bob Michel and held a post at the Dept. of Education under Secretary of Education Lamar Alexander.