Euro RSCG London hired Samantha Alonso as a senior planner and Rachel Filer as a planner. Alonso was previously head of brand and business strategy at Naked Communications and Filer joins the agency from Dare Digital.

Ingrid Bernstein was tapped to head up JWT New York's Experience Department, which will use digital technologies to create effective, long-lasting communications platforms for brands. Most recently, Bernstein served as a digital strategy director at JWT New York.

Stuart Smith will return to Wieden+Kennedy New York as head of planning. Smith, who was head of planning for W+K London from 2003 to 2008, will fill the position vacated by Neal Arthur, who earlier this month was promoted to managing director of W+K NY. Smith spent the past two years as director of planning for Google Creative Lab.

Betawave hired Pete Auerbach in the newly created position of senior vice president, sales.

DNA hired Tom Sobotta as account director; Erin Petterson as an account coordinator; and promoted Gretchen Anderson to account supervisor.

Nexage hired Ernie Cormier as chief executive officer and president, taking over for Devkumar Gandhi, who will remain active with Nexage as founder.

Palisades Mediagroup hired Laura Jean Bracken as executive vice president, chief operating officer, and Shelley Watson as senior vice president, media director, national broadcast group.

Saatchi & Saatchi X hired Kevin Shelhamer as senior vice president, managing director of the Chicago office and Robert Thompson Ph.D. as vice president, research & discovery of the Chicago office.

Catherine Kolodij has been named senior vice president of strategy at Allen & Gerritsen. Previously, Kolodij was vice president, strategy at Hill Holliday, responsible for consumer insight and brand positioning for Liberty Mutual, Procter & Gamble, Rockport and Cognos.

Canoe Ventures promoted Dana Runnells to vice president of marketing and communications.