Comcast promotes Sophia Marshall to senior vice president-communications, Central Division, headquartered in Atlanta ... Sprinklr, customer experience management platform, promotes Jacob Scott to general counsel-corporate secretary, effective March 16, replacing Dan Haley, leaving after March 15 ... Ad.net adds former Meredith National Media Group President Catherine Levene to its board ... Sales engagement platform Groove names Patrick Neise, former director-operations, NSA Red Team, chief information security officer ... Cyber deception company Acalvio Technologies appoints retired Navy Adm. James Winnefeld, former Joint Chiefs of Staff vice chairman, to chair its newly formed federal advisory board ... QuSecure, supplier of post-quantum cybersecurity enterprise software, adds Intelsat Chairwoman Lisa Hammitt to its board as its first independent director ... Cinemark founder Lee Roy Mitchell leaves the board, succeeded by Kevin Mitchell as a Mitchell Investors board designee ... FCC Chairwoman Jessica Rosenworcel announces retirement of Wireline Bureau Deputy Chief Diane Holland after 25 years with the agency … NAB promotes Alex Siciliano to senior vice president-communications … YouTube CEO Susan Wojcicki says she’s leaving the company; Chief Product Officer Neal Mohan to succeed her as CEO.