The History Channel has promoted Nancy Dubuc to take over as exec VP-general manager.

Dan Davids, a 22-year veteran of History and parent network A&E, will leave his post as president of the net at the end of the year.

Dubuc will report to Abbe Raven, prexy-chief exec of the A&E TV Networks. Raven, who announced Dubuc’s promotion Monday, was herself G.M. of the History Channel through 2002.

Dubuc said she doesn’t plan any big changes in the History Channel sked. “We don’t need to reinvent History,” she said. “It does its job in reaching upscale male viewers between the ages of 25 and 54.”

Older-skewing network has a median age of 47. About 32% of its audience is older than 55.

Programming, consumer marketing, strategic planning and brand development areas report directly to Dubuc. Also under her aegis are spinoff channels History Intl., History Channel en Espanol and Military History Channel.

Dubuc was most recently senior VP of nonfiction programming and new-media content for A&E. She said she’d transfer some of her experience in new media to History, strengthening its on-demand service and exploring more ancillary areas for the net’s programming such as iPods and broadband.

At A&E she supervised the development and production of successful original series including “Dog the Bounty Hunter,” “Intervention” and “Dallas SWAT.”