The media portion, currently at MindShare, and JWT's field marketing duties, will stay put for now. In an email, JWT New York co-presidents Rosemarie Ryan and Ty Montague tell staffers that "in the past 5-1/2 years, we have helped double their business in size (and accumulated quite a few creative accolades for the work along the way)." But, they continue, "their needs moving forward are quite different than what we will be able to provide."