Garry is currently Chairman of Myer Holdings Limited (since November 2017) and a Director of Treasury Wine Estates Limited (since 2012) and Dulux Group Limited (since 2010). Garry held previous roles including as Chairman (2017) and Director (2014 to 2017) of Spotless Group Holdings Limited, Chairman of PanAust Limited (2008 to 2015), a Director of Qantas Airways Limited (2005 to 2015), Senior Partner of Ernst & Young, Chief Executive Officer and Country Managing Partner of Arthur Andersen, a Board member of Freehills (now Herbert Smith Freehills) as well as Deputy Chairman of the Board of Mitchell Communication Group Limited.

Garry is a Fellow of the Australian Institute of Company Directors and Chartered Accountants in Australia and New Zealand.