NEW YORK Con Williamson has rejoined JWT here as an executive creative director after freelancing on the agency’s successful pitch for Royal Caribbean.

JWT led a WPP Group team that won global marketing services duties on the estimated $90 million account in December after a review. The other finalists were teams from Interpublic Group (led by DraftFCB and Initiative) and Publicis Groupe (led by Saatchi & Saatchi and MediaVest).

Williamson, who previously worked at JWT between 2001 and 2004, becomes the eighth ecd at the WPP Group agency, all of whom report to New York chief creative officer Ty Montague.

“Ty and I just sort of get each other,” said Williamson, 38. “He puts you in charge of yourself [and says], ‘Go make great stuff.'”

“He is one of the most talented creatives in the business and his experience with and passion for content creation—long form, short form, digital, you name it—dovetails perfectly with what we’re doing here at JWT now,” said Montague. “Plus he’s fun at parties.”

Williamson will work on Royal Caribbean, the U.S piece of JWT’s global Nokia business and JetBlue. In addition, he’ll contribute to new business pitches and oversee the shop’s JWTwo division, which includes post-production, branded entertainment development and a Web-based outlet for creative experiments known as The Nursery.

During his last tour at JWT, Williamson was a creative director who worked on Smirnoff, Domino’s, Merrill Lynch and Ford. He left in 2004 to help launch Lodge 212, a “creative collective” in New York whose clients included ESPN, DC Shoes and L.L. Bean. Williamson left the Lodge, now known as Lodge Films, after his partner, Michael Haje, decided to move to Nashville.

Earlier in his career, Williamson was an associate creative director at Publicis Groupe’s Fallon in New York, working on accounts such as Conseco, Time, the United States Tennis Association and ABC Sports. Before Fallon, he was an acd at Holland Advertising in New York.