HBO named Casey Bloys as its new president of programming, going with an internal hire as the network hunts for more hit shows like “Game of Thrones.”

Bloys will replace Mike Lombardo, who is stepping down after more than 30 years at the premium TV network, the Time Warner Inc.-owned company said in a statement Monday. Lombardo had led production at HBO since 2007, back when the channel was hunting for a hit to replace “The Sopranos,” and helped deliver shows like “True Blood,” “True Detective,” “Girls” and “The Jinx.”

Yet HBO hasn’t been able to create another juggernaut like “Game of Thrones,” with big productions including “Vinyl” and “The Leftovers” generating underwhelming reviews and ratings. The network needs more buzz to draw subscribers to its online HBO Now service, which competes with Netflix Inc. and Hulu LLC for streaming-video viewers.

While HBO represents about 20 percent of Time Warner’s sales, the company is counting on the channel for growth as its other cable networks, like TNT and TBS, contend with declining subscribers.

Bloys has been in charge of comedy and drama series, late night and specials at HBO since earlier this year. He’s worked his way up the chain since joining the network in 2004 as a director in development at HBO Independent Productions.

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