GSMA names Vivek Badrinath, ex-Vantage Towers, director general-board member, effective April 1 and succeeding Mats Granryd, stepping down (see 2409100066 and 2406050061) … Exabeam taps Kish Dill, LogRhythm, as chief customer success officer … Alaska Communications appoints leader Dale Knipp, ex-Slalom, as senior vice president-business ... Tegna announces Ellen Crooke, senior vice president-news, retiring in January ... Boycom Cablevision hires Reid Morgan, ex-Sparklight, as vice president-operations and engineering.