Lyall was appointed as Business NSW President in February 2020. He has was elected to the Board in 2014 and has been a councillor of Business NSW since that time. He is currently the Chief Executive Officer of Evolve Housing and the Head of Property and Investments of the Manly Sea Eagles and was previously the Group Chief Executive Officer of the Cronulla Sharks. He is currently a Director of Cricket NSW. In June 2017 he was appointed as Chair of the Parramatta Park Trust.
In June 2010 he was appointed by Football Federation Australia as Head of the Hyundai A-League and in May 2012 as the founding Executive Chairman of the Western Sydney Wanderers, a position he held until July 2014. Lyall is the former Executive Director of an Australian Securities Exchange (‘ASX’) listed public company (a merchant bank and investment holding company specialising in corporate finance, corporate advisory, strategic investment, property and asset management) and was formerly its Executive Director of Finance and Administration.
He was the founding Chief Executive Officer and subsequently Executive Chairman of the Central Coast Mariners, one of the eight founding clubs in the Hyundai A-League. Lyall was extensively involved as the NSW Manager for the implementation and management of the Commonwealth Government Block Grant Authority capital construction program involving the assessment of project viability, risk analysis, financial overseeing and monitoring of the construction of property projects valued in excess of $50 million per annum.