About Mark Geoffrey O'Brien

Mark is listed in Chambers Asia Pacific, the Clients Guide, 2019 as a Band 1, Media lawyer, and is cited as being "a highly knowledgeable media lawyer who has a very high level of expertise and an immense knowledge and understanding of the media industry". 

Mark Geoffrey O’Brien brings more than 40 years experience in managing cases spanning media and defamation, commercial law, intellectual property and representation in ICAC and negotiations with ASIC.  He has worked for public corporations, company directors, major media organizations, artists, small and medium-sized businesses, politicians and community organizations. 

Mark has headed the litigation group in several national Australian legal firms, has conducted many leading cases in the Federal Court and Australian Supreme Court and has worked with leading US, UK and European law firms.  He has been consistently acknowledged and recognized as one of Australia’s leading lawyers in independent peer review publications.