Powered named KEN NICOLSON as president and chief executive officer.

Waterfront Media hired MARC FIERZ as director of strategic partnerships, DEBRA DAVIDSON as senior director of research and AMY FENG as senior director of client services.

GenArts hired former Massive chief operating officer and co-founder KATHERINE HAYS as CEO.

Tribal DDB Worldwide hired MIKE CASEY as planning director for Tribal DDB San Francisco. Casey joins the agency from BBDO West, where he was previously director of digital planning.

Javelin Direct named SATNAM SINGH vice president, decision support. Prior to joining Javelin Direct, Singh was principal consultant for the Customer Insights Group at Avenue A | Razorfish.

TokBox promoted NICK TRIANTOS to chief executive officer and board member.

TY TRIPPET joined Condé Nast Traveler as director of communications, where he will direct public relations and communications efforts for the magazine.

The Brand Union named New York office design director KHEIREDDINE SIDHOUM managing creative director for the agency's Paris office.

Avenue A | Razorfish Seattle named DAVID HARTT as group creative director and STEPHEN MCDANIEL as analytics director.

ALISON DAMICO and DEREK REESE joined LinkedIn as account executives.