Ayman Guirguis


Level 31
1 O'Connell Street
Sydney NSW 2000
Mr. Guirguis advises clients on all aspects of antitrust/competition law as well as consumer law.

Mr. Guirguis has a wealth of experience advising clients on merger clearance, joint ventures and on supply chain arrangements between suppliers and customers.

Mr. Guirguis regularly advises on, and responds to, regulatory investigations by the Australian Competition & Consumer Commission (ACCC) alleging cartel conduct (price fixing, market sharing or bid rigging), including making immunity and leniency applications, competitor interactions at Industry Associations, as well as on other anti-competitive allegations such as misuse of market power, exclusivities, including defending litigation commenced by the ACCC.

Mr. Guirguis also counsels clients on the Australian Consumer Law, including advertising and sales, marketing practices as well as compliance programs and audits.

Mr. Guirguis has acted for clients across a range of industries including petroleum, oil and gas, property and construction, financial services, packaging, IT, retail, including food and fast moving consumer goods (FMCG) and pharmaceutical.


  • Bachelor of Economics, University of Sydney (1985)
  • LL.B., University of Sydney (1987)
  • LL.M., University of Sydney (1999)


Federal Court of Australia, High Court of Australia, Supreme Court of New South Wales, Supreme Court of Victoria
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