Lyndall is an Assistant Commissioner in the Australian Taxation Office’s Public Groups and International (PGI) business line, focusing on the International Division. Lyndall has a key leadership role across the International division as well as having leadership responsibilities across the PGI business line and across the ATO. Lyndall began her tax career at one of the big four accounting firms in Sydney working as part of their Corporate Tax team for a period of 10 years. She then joined the Australian Taxation Office in 2003 and has gone on to leadership roles in various areas within the organisation, including the Banking and Finance division, Dispute Management and Litigation and Interpretive Assistance.