Omnicom Oceania has promoted Kim Hamilton to chief marketing and communications officer as part of changes to its senior leadership team.Hamilton moves up from her role as chief marketing officer at Omnicom Media Australia, where she led the development of the group’s centralised marketing and growth function. In her new position, she will oversee brand, communications and market positioning, while continuing to work closely with the media division.Alongside this, Paige Prettyman has joined the organisation as chief of staff, a newly created role. She joins from Deloitte Digital, where she was managing director, and has previously held roles at Special Group Melbourne and Clemenger BBDO.The chief of staff role has been introduced to support execution across the business, with a focus on aligning strategy and delivery.Commenting on the appointments, Nick Garrett said the changes reflect the company’s focus on strengthening alignment, enhancing customer focus and driving commercial impact.