Mr. Duerden, 49, who has been running the international side, will report to Paul Fireman, chairman and chief executive.
The office will report to Burt Manning, chairman and chief executive of Thompson.
He will report to Anthony Terracciano, chairman and chief executive of the parent company.
He will report to Barry E. Loughrane, chairman and chief executive, who made the announcement.
In New York, he will report to Andy Berlin, chairman and chief executive.
He will report directly to Michael Bozic, chairman and chief executive of the merchandise group.
He will report to Bill Mechanic, chairman and chief executive of Fox Film Entertainment.
The council will report to Tom Bernardin, chairman and chief executive at Burnett.
He will report to Gary Goldsmith, chairman and chief creative officer.
Mr. Mills will report to John Wren, chairman and chief executive of the diversified services division.