Sean Starkweather was named creative director at visual effects post-production studio ArsenalFX in Santa Monica, Calif. He had been a creative director at Stardust.


Encompass Digital Media in Atlanta has named Chris Walters as its CEO. He comes from The Weather Co., where he had been chief operating officer.


Bruce Lefkowitz was upped to executive vice president, advertising sales, at Fox Networks Group. He had been EVP, advertising sales for Fox Cable Entertainment.


John Warrack was promoted to partner at executive search firm JM Search, leading its media and telecommunications practice. He joined JM Search in January of 2013 after more than 20 years with Cablevision Systems, Heidrick & Struggles and Viacom.


Over-the-top media firm PTA Networks has named Betsy Sanner Ayala as head of programming and production. She comes from Moxie Pictures’ television division, where she was executive producer and head of new development.

Also, Billy Fox has joined PTA as head of advertising sales. He comes from Apple, where he was No. 1 senior sales leader for iAd, the computer firm’s mobile advertising platform.


Andie Beckerman has joined Syfy as vice president, alternative development and production, based in Los Angeles. She comes from AMC, where she was director of development, unscripted original programming.


Liz Alderman has joined production shop Tremendous! Entertainment in New York as director, development. She comes from Soshefeigh Media, where she spearhead casting for a new format now in development with a major cable network.

Also, Brandy Crawford joined Tremendous!’s New York office as senior manager of development. She comes from History, where she was senior manager of development and helped establish the network’s scripted department.