Tony Holcombe was tapped as CEO of Syniverse Technologies.

Sprint Nextel announced John Garcia, senior vice present of strategic partners for Sprint Consumer Solutions, will head up the joint venture between the carrier and its cable partners, Comcast, Time Warner, Cox and Advance/Newhouse.

Nortel appointed Don Mckenna vice president of Global Manufacturing Services.

Bernard Stolar was appointed to the board of directors of Summus.

SlipStream Data announced the addition of Ante Rupcic and Cam Ruttle to its executive management team.

Peter Wolf was named vice president of product management with MobileLime.

Cingular Wireless' CTO Kristin Rinne was re-elected as chairwoman of 3G Americas.