Struck hired Rikki Teeters as senior UX lead and Jimmy Carson as copywriter.

NBCUniversal promoted Chris Czarkowski to senior vice president, Hispanic group advertising sales.

Diane Mattioli joined GQ as executive director, luxury & video.

Cronin and Company hired Jeremy Maendel as a front end developer/ interaction designer and promoted Frank Rinaldi to account director; Sarah Melnitsky to senior account supervisor; Charlene Durham to senior account supervisor; Suzanne Carbonella to account supervisor; and Shannon Cunningham to senior media planner/buyer.

Nicolas Will and Andrew Berg launched Humdinger & Sons, a video and design agency focused on helping emerging startups and technologies build, launch and grow their brands.

Trixie Ferguson Gray joined MediaCom as senior partner, branded content & experiences, a new position at the agency. She will lead content strategy, custom program development and activation for clients across MediaCom. Ferguson Gray reports to Mark Fortner, managing partner and head of innovation. She joined MediaCom from Maxus, a GroupM sister agency, where she led insights, creative strategy and media ideation for NBCUniversal, UPS and new business. Prior to that, she was vice president, experience architect and a member of the Content and Experiences team at UM.

Landor promoted Tom Sepanski to regional director of naming and verbal identity in North America. Sepanski will lead Landor's North American team in finding verbal identity solutions that include naming, brandlines, messaging and brand voice. He has developed verbal identity solutions for clients including American Express, Barclays, Kiehl's, Lancome Paris, Procter & Gamble, Samsung and Verizon. Joining Sepanski on Landor's naming and verbal identity team in New York are Julie Doughty as director of naming and writing, and Margherita Devine as manager of naming and writing. In Landor's San Francisco office, Marc Hershon was named senior manager of naming and …