One of the top executives in the entire business of television, the longtime chairman and CEO of MTV Networks, has resigned.

She’s the well-liked, well-respected Judy McGrath, who has been at the company 30 years this year. She’s held her current position since July 1994, when another former beloved MTV exec, Tom Freston, named her to the post.

Here’s McGrath’s statement about her departure: "The people of MTV Networks have always been singularly important to me. Together we have built world-class brands that connect with fans from kid to adulthood, from ‘SpongeBob’ to ‘Hot In Cleveland,’ from ‘Unplugged’ to ‘The Daily Show.’ We have attracted and nurtured the best talent in the world, and I know that will always be a hallmark of the company. Creatively, financially, all the brands and businesses are in wonderful shape today. I leave with pride, joy and gratitude for the ride of a lifetime. I especially thank my friends and colleagues on the senior team, who will continue to lead a kick-ass organization. They have my respect and affection, always."

Instead of replacing McGrath, 58, members of her senior team will now report directly to Viacom President and CEO Philippe Dauman.

In a long memo praising McGrath, Dauman also wrote, "Effective immediately, Doug Herzog, President, MTVN Entertainment Group; Van Toffler, President, MTVN Music & Logo Group; and Cyma Zarghami, President, Nickelodeon & MTVN Kids & Family Group – each of whom have successfully led their teams for many years and all of whom have moved their organizations forward creatively and operationally – will report directly to me."