Dave Weist and Tim Vaccarino have been promoted to executive creative directors, up from group creative directors, at Mullen. The pair are lead creatives on JetBlue and Barnes & Noble.

Euro RSCG Chicago hired Liz Lang as account director and promoted Deirdre Egan to managing director.

WE ARE Pi, a full-service Amsterdam-based creative communications agency, has opened its doors. Jamie Kim, Rick Chant, Barney Hobson and Alex Bennett Grant, who worked together at Wieden+Kennedy Amsterdam, founded the agency. WE ARE Pi clients include Deloitte, Lego, Bread & Butter, TEDx Amsterdam and Habitat For Humanity.

Goodby Silverstein & Partners hired Ralph Watson as executive creative director for its Detroit office. Watson previously served as executive creative director on the AT&T account at BBDO New York.

Mediabrands named Lauren Snyder as chief communications officer. Prior to joining Mediabrands, Snyder was executive vice president, chief communications officer for Kerzner International Holdings.

Janet Kestin and Nancy Vonk, co-chief creative officers at Ogilvy Toronto, are leaving their posts to launch Swim, a creative leadership training lab.

Adara Media hired Mark Hersch and Jeff Cohen as vice president s of strategic accounts; Brandon Meyers as sales director; and Andrew Freedman as regional sales director for the eastern region.

Amy Cheronis, formerly senior vice president of Worldwide Communications at Leo Burnett Worldwide, was promoted to executive vice president to lead its global and US brand communications efforts.

The Visionaire Group hired Ian Campbell as vice president of creative. Previously, he was creative director for the NFL.

David&Goliath hired Eron Broughton as associate creative director.