Ms Mayne was CEO of the Lend Lease Information Technology and Telecommunications Investments division. Subsequently, Ms Mayne was Owner and Executive Chair of Work Wear World.
Ms Mayne is a director of Chief Executive Women, comprised of Australia's leading female CEOs, and Co-Director of its Leaders Program. She jointly runs a leadership program in the Pacific for the Asian Development Bank, and the Australian and New Zealand governments, in addition to representing Australia at APEC.
Ms Mayne is Co-Chair of The B Team Australasia, a company formed by a global group of business leaders led by Richard Branson. Lynette has also held positions on a state (NSW) Health Industry Council (Chair); the Australian Government Trade Policy Advisory Council and APEC; the ACTU-Lend Lease Foundation (Chair); and the Commonwealth Bank of Australia's Diversity Council. She has a Prime Minister's Centenary Award for leadership in industry.