Cogeco Cable Inc. said Wednesday that Richard Shea and David Isenberg will share the title of president at its U.S. subsidiary Atlantic Broadband, as of Jan. 1. Shea will also be given the title of CEO on that date, and Isenberg will become chief revenue officer, Cogeco said in a press release. The promotions are being done as Edward Holleran gets set to step down as CEO and president of Atlantic Broadband at the end of this year. Cogeco said Holleran will stay on part-time as vice-president of industry relations. Cogeco said both Shea and Isenberg have been with Atlantic Broadband since it was founded in 2003. Shea is currently chief operating officer and Isenberg is chief marketing and strategy officer. Atlantic Broadband was bought by Cogeco two years ago. Cogeco said in the release that Atlantic Broadband is the 13th biggest cable provider in the United States, serving regions along the East Coast.