Berndt Baumgartl was named president and CEO of Siemens Communications' U.S. affiliate.
Zingy appointed Andy Volanakis CEO of the mobile media company.
Proxim Wireless named David Olson president and COO.
Hichem Garnaoui, former vice president of U.S. Cellular's national network operations, will head operations for LCC International's Americas region.
Craig Peddie was appointed vice president and general manager of the embedded speech solutions business for Nuance Communications' speech division.
Former Cingular executive Jon Vlassopulos joined reality TV show producer Endemol USA as vice president, new media, business development and strategic planning.