National Association for Multi-ethnicity in Communications hires Daija Arias, ex-RCN International Distribution, as vice president-marketing and development ... Univision Communications promotes Kevin Conroy to chief strategy & data officer, and president-enterprise development, and Isaac Lee to president-news & digital, and CEO, Fusion ... Cognitive Networks hires Nick Chakalos, ex-Catch Media, as senior vice president-global distribution ... Tremor Video hires Mark Kalus, ex-Sizmek, to lead product strategy and implementation of demand-side platform ... Cybersecurity expert John McAfee to keynote NAB Show Technology Luncheon April 15, 12:30 p.m., Westgate Paradise North Ballroom, Las Vegas ... Lobbyist registrations: Google, S-3 Group, effective Feb. 1 ... Pandora, Forbes-Tate, effective Jan. 15 ... PCIA, Capitol Tax Partners, effective Jan. 15.