Christina Hill and Ricky Jacobs joined Proximity Canada, both serving as vice president, managing director.
Carton Donofrio Partners hired Jon Leon as art director and David Frisch and Paula Lattanzi as senior account leaders.
Kantar Video named Arthur McKinley as vice president, business development.
Mothership has named Scott Gemmell as head of production. Gemmell was formerly head of production at Motion Theory.
Critical Mass named John McLaughlin as chief operating officer and Scott Ross as senior vice president, executive technology director.
MEC North America named Jitka Petrickova as managing director, digital west. Previously, Petrickova was managing director at Starcom MediaVest.
Robert Howell has returned to ignition, serving as vice president.
Paul Reardon has been appointed executive creative director for Whybin/TBWA/Melbourne. Reardon joins the agency from Clemenger BBDO Melbourne, where he spent the last five years producing campaigns for brands such as Mercedes-Benz, Snickers, HBA Health Insurance, RACV, Hard Yakka, Fat Yak Pale Ale, Strongbow, Dulux, M&Ms and Corona.
TRIS3CT hired Chris Cancilla as executive creative director. He joins the agency from Y&R Chicago where he was senior vice president, group creative director responsible for Sears, Hilton Hotels, Dave & Buster's and The American Red Cross.
Mozes hired Amanda Van Nuys as vice president of marketing.
SapientNitro hired David R. Mitchell as vice president, creative in the Chicago office. Mitchell joins SapientNitro from Digitas in Chicago where he was senior vice president and executive creative director.
Arnold Worldwide elevated Keith LaFerriere, Bob Goodman, Trevor Nardini, John Raftery, Renee Smith and Karin Wood to senior vice presidents in its Boston office.
MWW Group hired Dave Arnold as vice president. Arnold most recently served as communications director for former Rep. Anthony Weiner (D-NY).
Euro RSCG Chicago hired Lisa Leone as a creative director. Previously, Leone served as vice president and creative director of BBDO Chicago. In addition, Elena Robinson was named director of integrated production.
Jumptap hired Gregg Steckler to handle Midwest and Texas mobile partnerships.
Wunderman hired Aaron Lavin to lead the agency's work with Microsoft's consumer products and services marketing groups.
Bernstein-Rein promoted Stephanie DeCelles to account director for MetLife B2B and hired Erin Sass as digital account supervisor for the Family Dollar account.
Glow Interactive launched a new division, GLOW Social, to be led by Howie Kleinberg, as president of digital.
MKTG INC promoted Patty Hubbard to president of the West Coast region and Chris Dalton to senior vice president of the West Coast region. In addition, Molly McDaneld was named vice president of production services for the San Francisco office.
Deutsch LA hired Walt Smith as executive vice president, group account director, and John Deschner as senior vice president, digital group account director on the HTC account.
Mitch Gelman was named vice president/product at Gannett Digital. He will be responsible for overall product management of Gannett's portfolio of Web sites and mobile products, including USATODAY.com and Gannett's local newspaper and broadcast sites.
Devora Rogers was named group director of global business development of Mediabrands agency, Shopper Sciences. Prior to joining Shopper Sciences, Rogers was director of product strategy at the IPG Emerging Media Lab.
Disney Interactive Media Group hired Mitchell Kreuch as vice president, digital ad sales for the eastern region of the U.S.
PerformLine hired Greg Nicholson as senior director of business development.
Deutsch New York hired Jason Clement as senior vice president, group planning director, innovations and digital, and Robert Swartz as senior vice president, group planning director on the Microsoft business. Clement comes to Deutsch from Wieden+Kennedy New York where he was director of emerging platforms. Swartz most recently served as worldwide group account director for IBM at Ogilvy's New York office.