C&L: Network Chemistry appoints CEO

Virgin Mobile USA has hired Jonathan Marchbank as COO.

Wireless security company Network Chemistry appointed T. Paul Thomas as CEO. 

MobiTV has hired Dale Knoop, formerly of Sprint's general manager of multimedia, as senior director of business development.

The CDMA Development Group named Dr. Chungming An vice present for greater China and southeast Asia.

David Hytha joined Option's board of directors.

Jeffrey Metzger was appointed vice president of product development with TruePosition.

Versent Mobile named Chris Rechtsteiner executive director of market development and Richard Gaski director of product management.