Greg Braden, vice president of digital telephone services for MediaOne, will replace Hockemeier, according to a representative for AT&T Broadband. AT&T is in the midst of acquiring MediaOne.
Hockemeier did not tell executives at AT&T Broadband which company he plans to join, according to the representative. Hockemeier cited family reasons for his departure.
Hockemeier becomes the latest in a string of executives to leave Ma Bell. In October, Leo Hindery Jr., the former chief of Tele-Communications Inc. and appointed AT&T cable head, abruptly resigned. Hindery is now the chief executive of long-distance phone company Global Crossing. And just last month, wireless division president Dan Hesse left AT&T to become chief executive of TeraBeam Networks, a Seattle-based communications start-up.
AT&T Broadband is the telecommunications giant's cable services division. It oversees programming services, high-speed Internet access and local phone service over the company's vast cable network.
Braden's role at MediaOne mirrors Hockemeier's role at AT&T Broadband, the representative said.