Veteran Joe Hogan will leave his senior role at WarnerMedia’s ad sales after working at the company for 30 years, and will be succeeded by Katina Cukaj, who takes lead for advertising sales and partnerships under JP Colaco.

Cukaj, who led ad sales for a time at CNN and moved on to tackle broader responsibilities within WarnerMedia’s sales organization, will become the point person in the company’s ongoing effort to talk to agencies and buyers about advertising opportunities at its cable networks and its new HBO Max. AT&T said earlier this month it had secured $80 million in advance commitments for an ad-supported tier of the still-nascent streaming service.

“On behalf of the entire company, we thank Joe for his meaningful effort and commitment to the ad sales organization over the past 30 years. We wish him continued success in his next journey,” said Colaco, in a prepared statement.

Hogan was best known for his work to secure advertising support for Cartoon Network and Adult Swim, and helping to craft non-traditional placement of commercials within animated programs aimed at younger consumers. In 2014, for example, Hogan spearheaded an effort to give sponsors on-screen placement in the lower corner of the screen where a “bug,” or network logo might typically reside.

Cukaj has increasingly taken on new responsibilities since joining CNN as an account executive in 1999. She was named executive vice president of CNN sales  and took over that part of the business following the departure of veteran executive Greg D’Alba. She would go on to oversee a companywide effort to sell advertisers packages of inventory across various WarnerMedia assets. The company said she will continue to oversee marketing, creative and network partnerships until a replacement is announced.

Cukaj “has demonstrated her capabilities wearing a variety of leadership hats, including as executive vice president of CNN Ad Sales,” said Colaco. “I know she will infuse the spirit of collaboration into every initiative and wield her passion for WarnerMedia’s history of iconic storytelling to propel our sales organization and our partners into the bright future.”