NCTA elects Mark Greatrex, Cox Communications, as chairman; Chris Winfrey, Charter Communications, vice chairman; Dave Watson, Comcast, treasurer; and Pat McAdaragh, Midco, interim secretary; adds to board Chris McCarthy, Paramount, and Chuck Treadway, CommScope ... Comtech names interim CEO John Ratigan president-CEO and board member and appoints Ken Traub, Delta Value Advisors, to board ...Telecom foundation prpl Innovation adds to board John Valdez, Frontier Communications; Mike Emmendorfer, Calix; and Sreekanth Natarajan, Qualcomm Technologies ... Grocery TV names to board Alison Levin, NBCUniversal Media.