Elliott Wiser is leaving his position as general manager of St. Petersburg CBS affiliate 10News.
Wiser, 60, announced his departure in a Facebook post late Thursday.
There was no immediate word on his replacement.
"Today I resigned as President/General Manager of 10News WTSP. I will be working with (10News owner) TEGNA over the next few months as it transitions leadership. I want to thank the wonderful staff at the station for an amazing 3 years. WTSP is stronger today and will only get better," he wrote.
"I plan to teach and do other non-media projects. I have had an amazing 38-year career, but I'm ready for the second act of my life. I am energized, happy and ready to try new things."
Wiser, who may be best known for creating local cable news channel Bay News 9, became GM at WTSP in June 2013, succeeding retiring general manager Ken Tonning.
His switch from being a longtime leader of Bay News 9 was viewed as a major shakeup at the time, marking the first time in recent memory that a top executive moved to a rival TV news outlet in the Tampa Bay market.