Y&R Mattingly MD Geoff Ingall will now chair the agency.
Y&R regional CEO Hamish McLennan said Ingall would continue in a hands-on role with clients.
“Kim has an outstanding track record in Melbourne and his addition to the team at Y&R Mattingly will be a significant boost to our management line-up and our plans to drive the agency’s growth.
“Geoff Ingall will continue to play an active role with clients as he has a depth of knowledge and experience in this market that would be difficult to replace,” McLennan said.