Frontier Communications promotes President and board member Daniel McCarthy to also be CEO, effective April 3, succeeding Maggie Wilderotter, named executive chairman ... Discovery Communications hires Marc Graboff, ex-Core Media Group, as president-global business & legal affairs, production management and studios, including digital platforms globally, effective in April, and promotes Lee Bartlett to president, studios group ... Irell & Manella starts Cyber Liability and Privacy Practice, which includes Marc Maister, insurance expert; Lindsay Kelly, ex-U.S. attorney's office, Eastern District of Virginia Cybercrime unit; and Andra Greene, head, class-action defense practice ... 21st Century Fox promotes Chad Copher to vice president-ad sales overseeing the Midwest region, Home Team Sports ... TeleCommunication Systems adds to board Don Bell, technology entrepreneur, and Michael Madon, cyber intelligence expert; Executive Vice President and Chief Operating Officer Richard Young resigns from board ... CrowdStrike adds to board Joe Sexton, AppDynamics.