Stephen Marks is a Chartered Accountant. He was formerly Managing Partner and National Chairman of Sothertons Chartered Accountants.

He then became a successful Probity Auditor and Adviser to numerous State and the Commonwealth Governments. He later became a professional company director. He was the Board Chair of Chisholm Institute and a director of St. Vincents Research Institute for many years as well as a number of other companies.

He was awarded the Medal of the Order of Australia for service to the community through a range of roles