John Dyer, chief operating officer of Atlanta-based Cox Enterprises, will assume the role of president and chief executive officer on Jan. 1, the company announced Thursday.

Dyer will be responsible for the company’s four main subsidiaries: Cox Communications, a cable TV provider; Manheim, a wholesale vehicle marketplace; AutoTrader Group, an online auto classified marketplace; and Cox Media Group, a broadcasting, publishing and digital media company. Cox’s holdings include The Atlanta Journal-Constitution.

Dyer, a 36-year company veteran, will replace retiring CEO Jimmy Hayes, who has been with the company for 33 years and has served as president and CEO since 2008.

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Managing Partner at Atlantica Properties, Darion Dunn (center) talks with Atlanta Mayor Andre Dickens during a tour following the ribbon cutting of Waterworks Village as part of the third phase of the city’s Rapid Housing Initiative on Wednesday, Dec. 3, 2025.
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