Mr Mrdak currently holds a number of non-executive director roles in the transport, infrastructure and regional development sectors. He is the Chair of the Airports Development Group of companies, including the NT Airports Group. He is a Director of NBNCo and is also on the Advisory Boards of the Australian Infrastructure Financing Facility for the Pacific and LEK Consultants.
Mr Mrdak had an extensive senior career in the Australian Public Service, including as Secretary of the Departments of Infrastructure, Transport and Regional Development and the Department of Communications and the Arts.
Mr Mrdak was made an Officer in the Order of Australia in 2016 for his work in transport and infrastructure reforms and is an Adjunct Professor in the School of Business, Government and Law at the University of Canberra.