NEW YORK Brian Martin, director of business development at JWT here, is leaving the agency in mid-July, the WPP Group shop confirmed.
Jeffrey Stier, who joined the shop in March, will succeed Martin.
Martin declined to reveal his future plans, saying only, "It will be something entrepreneurial."
On his watch, the shop won accounts such as L.L. Bean, JetBlue, Jenny Craig and Welch Foods, but came up short in pitches for Pfizer's Lipitor, Verizon Wireless, Staples and the White House's Office of National Drug Control Policy.
Martin, 45, joined JWT in February 2004 and concentrated on the New York office's pitches, though he also contributed to JWT's North American efforts. He was part of a team that included New York co-president Rosemarie Ryan and co-president and chief creative officer Ty Montague.
"It was exciting to be part of the team that was winning and producing far more innovative work than JWT had been producing" in the past, Martin said. "I think I'm leaving it in far better shape than when I arrived."
Stier, 44, a former senior vice president of business development and member acquisition at ClubMom, assumes the title of director of business growth for North America, JWT said. He will report to Ryan and Montague, as well as global chief marketing officer Marian Salzman.
Before ClubMom, a Web-based clearinghouse of information geared toward mothers, Stier in 2003 helped launch the Luxury Television Network, along with Rob Quish. (Quish, then CEO of the network, joined JWT in April 2005 and now is region president for North America.)