William (Bill) Marmion was Deputy Leader of the Opposition in Western Australia until November 2020, and served as a Minister in the WA State Government between 2010 and 2017, holding portfolios of Finance, Commerce, Housing, Innovation, Science, State Development, and Mines and Petroleum.

Prior to entering politics, Bill was a civil engineer and the Quality Management Coordinator for Main Roads WA, a Value for Money Auditor for the WA Auditor General’s Office, and was a founding Partner and Director of the strategic planning and business case consultancy, Syme Marion & Co.

He is a Past President of the WA Division of Engineers Australia (EA) and currently Chairs one of five National Committees that report directly to the Board of EA.

He graduated from the University of Western Australia with a Bachelor of Engineering and a Master of Business Administration, is an Honorary Fellow of EA and a Member of the Australian Institute of Company Directors.