Preformed Line Products promotes Chief Operating Officer Dennis McKenna to CEO, effective Jan. 1, when current CEO Robert Ruhlman becomes executive chairman ... New ImOn Communications hires: David Birnbaum, ex-BlueVoyant, as chief information officer; Patty Lynott, ex-Zayo Group, as vice president-customer experience, and Cindy Huber, ex-Fiberutilities Group, as vice president-marketing ... Quickplay, over-the-top cloud provider, names Xavier Marle, ex-iWedia, regional sales director, Southeast Asia and Australia/New Zealand ... Lantronix President and CEO Saleel Awsare joins company board.