The agency last year lost Buffets Inc.'s $25 million account, one of the agency's largest.
Mr. Thacker, 56, will consult with the Omnicom Group agency on projects. He joined BBDO in 1999 from Sears, Roebuck & Co., where he had been senior vice president of marketing. He also had been vice president of marketing for Target Corp.
Mr. Haley, 53, joined the agency in 1990 as executive vice president and executive creative director. He earlier worked for Interpublic Group of Cos.' Campbell Mithun, Minneapolis and Northlich, Cincinnati.