Colliers International Group Inc. announced that Malcom Tyson has been appointed as chief Executive Officer -Australia. Tyson has been a senior member of Colliers Australian and New Zealand Executive Leadership team since 2005 and held a variety of executive and operational roles. He will take over the position of CEO from John Kenny, who was appointed as Chief Executive Officer | Asia Pacific at the beginning of 2020 after 15 years in the Australian role.