Law firm has two new partners and five new senior associates.
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.
Wellington-based partner, Jonathan Scragg has been with the firm since 2002.
Architect Vanessa Carswell joins Chris Jack to co-lead South Island projects.
Andrew Howie will take up the newly created role in the Wellington office.