Kirstine Stewart has been named exec VP of CBC, responsible for the Canuck pubcaster’s English services, effective immediately.

That makes Stewart head of CBC-TV, which is the main network; cable webs CBC News Network, Bold and Doc; plus CBC’s radio networks. Stewart had been interim exec VP since August, when Richard Stursberg abruptly stepped down.

No explanation was given for his departure, but Stursberg’s tenure had been controversial, with the exec aggressively courting a more commercial style of programming and radically revamping the news shows. Stewart has been general manager of CBC TV since April 2006. She helped shift the network from big-ticket movies and miniseries toward more series, such as business-themed reality show “Dragon’s Den” and sitcom “Little Mosque on the Prairie.”

Before CBC, Stewart was senior VP of programming at Alliance Atlantis, which owned a slew of cable channels.

CBC continues to face tough times financially, and CEO Hubert Lacroix said, “Kirstine Stewart is just the person to lead CBC into that future. She has helped drive a renewal of the organization through one of the most challenging periods in its history. Hers has been a remarkable career, and she is the clear choice for this important role.”