The Leo Burnett Worldwide chairman and chief executive, Tom Bernardin, said: "Andrew's track record for running an aligned Burnett/Arc entity is second to none. The energy that he'll bring the two brands now will be a huge boost for the company."
Edwards formerly ran the joint Leo Burnett/Arc operation in Sydney before moving to London in 2005 to take on the EMEA president role for Arc Worldwide.
Haines joined Burnett in February 2002. He was without a job at the time, having resigned from his role as chairman at Leagas Delaney the previous December, ending a 15-year partnership with Tim Delaney.
For the full story, see Thursday's edition of Campaign.