Allen & Gerritsen (a&g) named John Blyth as senior vice president, media strategy. He will report to Amy Muntz, a&g’s executive vice president, strategy. Blyth he will be responsible for managing an integrated team as well as overseeing the integrated media strategy for numerous a&g clients. He joins the agency from Havas Media, where he most recently served as vice president, account director. While there, he led the strategic direction of the digital media team and worked on the AutoZone, McDonald’s, GoodYear and Remy Martin accounts. In addition to Blyth’s hiring, a&g also added another five employees to the agency’s …

TBWA\Chiat\Day LA tapped Rohit Thawani as head of digital strategy. Thawani will work with TBWA\Chiat\Day LA and DAN LA clients including Pepsi, Nissan, adidas, Google and the Grammy’s. He will report to Nick Barham, chief strategy officer. Most recently, Thawani was a lead strategist at 72andSunny where he worked on Google Ad Arts. Prior to that, he spent three years at BBDO NY as digital strategy director working with clients such as FedEx, Mars Chocolate and Lowe’s Home Improvement. Thawani also worked in digital media for five years at Mediavest, where he led digital efforts for Coca-Cola’s strategic properties including …

Johannes Leonardo hired Michael Duda as chief executive officer. Duda will oversee the agency’s operations, teams and clients – including Google, Diet Coke, Sprite and Nike – working in partnership with agency co-founders and chief creative officers Jan Jacobs and Leo Premutico. Previously, Duda was co-founder and managing partner of Consigliere Brand Capital, a marketing management consultancy and investment fund. Duda will remain an investor in Consigliere. Prior to that, Duda spent more than a decade (1997-2000, 2001-2010) at Deutsch, most recently as partner and chief corporate strategy officer responsible for shaping the agency’s marketing, acquisition and joint venture planning, …

Wexley School for Girls hired Amy Lower as project manager, Rob Scherzer as a digital specialist and Evan Bross as an art director.

Definition 6 named Stewart Brooks as chief financial officer.

Dstillery (formerly Media6Degrees) hired Daizhuo (Henry) Chen, PhD, as a data scientist.

Fanscape hired Jennifer Chen as director of strategy, Aniela Rigali as account director and Amy Garcia as analytics manager.

Criteo named Jean-Louis Constanza as chief innovation officer.

Sam Champion is joining The Weather Channel to anchor the network's new flagship morning show, which is set to debut in early 2014. Based at The Weather Channel headquarters in Atlanta, Champion will also serve as managing editor. Most recently, Champion was the Weather Anchor of ABC’s “Good Morning America" and Weather Editor for ABC News.

Anton Josef joined the roster at Harpoon Pictures for commercial representation in the U.S.