R/GA hired Chuck Tso as executive creative director in the agency's New York office. He previously served as a creative director at DDB.

WeatherBug hired Pat Perrotta as a senior account executive in New York City; Lynn Weiss Kane as a senior account executive for the west coast team and John Phillips as an account executive on the Midwest team.

Following Montreal, Amsterdam and Paris, Sid Lee has launched a fourth office in Toronto. Vito Piazza serves as managing director for Toronto.

BBC America hired Matt Stein as vice president, promotions and creative services.

Adap.tv hired Jason Shulman as vice president of sales. Most recently, he served as the chief revenue officer at [x+1].

MPG hired Denise Leone as group director of its London office. Leone joins the agency from Optimedia, San Francisco, where she was a communications planning supervisor in the digital group.

Joe Gruchacz joined PHD in New York as strategist on the agency's Humana business. Gruchacz joins PHD from Pyper Paul + Kenney in Tampa, where he served as planner/buyer on accounts such as Grand-Am Racing, The ASPCA, The Florida Aquarium and the Tampa Bay Rays.

Williams-Helde Marketing Communications hired Steven Clough as media director.

72andSunny hired Cyndi Yee as culture and talent director.

Zoove hired Joseph Gillespie as president and chief executive officer. Most recently, Gillespie held the position of executive vice president, CBS Interactive where he headed up CNET.com.