Derek Phillips has returned to Critical Mass as content director for the Calgary office. Phillips was previously content director in the Chicago office before leaving to be a digital strategist and content lead with Portland-based The New Group. He will remain in Portland, leading Critical Mass' content department remotely.

Mothership named Dominic Bernacchi executive producer, marketing and sales.

360i has hired Jane Barandes as New York managing director. Prior to 360i, she was senior vice president of marketing at Publicis Modem.

Joe Kayser was named chief creative officer of Y&R West, a new position. In addition, John Berg is stepping down as president of Y&R West. Tom Sebok, President and CEO of Y&R North America, will assume Berg's responsibilities on an interim basis.

Jacobson Rost hired Paula Hunsche as executive media director. Hunsche previously served as interim managing director, client leadership at Mindshare.

Cohn & Wolfe hired Jeremy Rosenberg as senior vice president, Digital Practice. Rosenberg joins Cohn & Wolfe from Porter Novelli, where he was senior vice president of Digital Production.

Roald van Wyk joined Draftfcb New York as senior vice president, group creative director. Most recently, van Wyk served as vice president, creative director at Publicis Modem, where he helmed several traditional and digital campaigns for the General Mills and Cartier accounts.

Sharon Harper joined Mintz & Hoke Communications Group as a social media/public relations associate.

MediaTrust hired Richard Ramsey as advertiser sales manager; Mistie Johnston as publisher sales manager; and Frank Carta as principal software engineer.

Targeted Media hired Jim Gherna as New York account manager.