Mark Cairns has been appointed to the retailer’s board.
David Kirk says the appointment adds deep expertise in innovation and business transformation.
Experienced litigator Hayden Wilson was a driving force behind Kensington Swan's decision to combine with Dentons.
Duncan Smith has returned from overseas to take up the role.
Tim Poskitt is to manage Australasian operations.
Will Noble will take up the role late September 2020.
The seven concerned are Maree Wilson, Marg Joiner, Kate Walsh, Andy Cameron, Emma Ward, Caitlin Taylor and Imogen Morris.
Hillary Campbell is the youngest person and only the second woman to hold the leadership role.
Rick Ellis has more than 30 years of leadership experience
Nick Hawkins, who joined IAG in 2001, begins his new roles on November 2.