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DETROIT (AdAge.com) -- Douglas Pfaff, 31, joins Interpublic Group of Cos.' Campbell-Ewald, Warren, Mich., as senior vice president and manager of co-op systems and new technology.

He had been services director at Computer Consultants of America, Southfield, Mich. He succeeds David Stone, who retired.

Also at the agency, Carolyn Ward, 32, was promoted to a new vice president's post from senior account supervisor. She retains her duties on the AC Delco account.

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