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Professor of Taxation Law, University of Sydney

Dr Dirkis is a noted researcher, having authored and co-authored over 550 publications and papers. From May 1999 until October 2009 he was, as Senior Tax Counsel for the Taxation Institute of Australia, in the forefront of the all major tax reform and taxation administration reforms through participation in key Australian governmental consultative forums conducted by the Treasury, Australian Taxation Office, the Board of Taxation, the Inspector General of Taxation and the Australian National Audit Office and appearing before numerous Parliamentary committees.

He also engaged with international tax organisations such as the Irish Taxation Institute, Japan Federation of Certified Public Tax Accountant’s Association, the Japan Tax Research Institute, and the Asia-Oceania Tax Consultants’ Association, and with foreign revenue authorities through the Study Group on Asian Tax Administration and Research (SGATAR), the United States’ Government Accountability Office (GAO), New Zealand Inland Revenue Department, and HM Revenue & Customs.


  • 1999–2009
    Senior Tax Counsel, Taxation Institute of Australia


    ANU, BEc
    Adelaide, LLB
    South Australian Institute of Technology, GradDipLegalPractice
    Adelaide, LLM
    ANU, PhD