Mr O'Sullivan is an Ambassador for the Australian Indigenous Education Foundation. He was a former partner at Freehill Hollingdale & Page (now Herbert Smith Freehills Kramer) practicing in corporate, finance, mergers and acquisitions. He was also General Counsel of the Commonwealth Bank of Australia, Executive Chairman of Investment Banking and Capital Markets (Australia) at Credit Suisse Australia, and a Non-executive Director of AMP Limited. He is the Chairman of the Risk & Compliance Committee.