Marion's major area of practice is in Trade Mark law where she has extensive experience in strategically advising on international trade mark portfolio management and protection particularly within the Asia Pacific region. She also has particular knowledge in relation to geographical indications. Marion has also completed the WIPO Academy’s Advanced Course on Intellectual Property, Traditional Knowledge and Cultural Expressions
Marion is the recipient of numerous peer accolades and has been repeatedly featured as one of Australia's leading Trade Mark Law Practitioners in the Managing Intellectual Property's (MIP) Expert Guide, as an MIP ‘IP Star’ as well as being included in their Top 250 Women in IP. She has been ranked consistently listed by Best Lawyers as one of 'Australia's Top Lawyers' in Intellectual Property since the inception of their Australian rankings and as one of Asia Law’s leading lawyers, among the worlds leading practitioners in the Expert Guides: Trade Marks edition. She is also listed as an Asia IP Expert, a leading individual in the World Trade Mark Review 1000 and the World IP Review’s list of Leaders in IP Private Practice. The Australasian Legal Business Guide on Intellectual Property Law describes her as being 'brilliant in regards to all TPA-related issues'. WTR says she is “always sensible, always professional” and a “touchstone for those seeking watertight protection across Asia-Pacific”.
Marion is currently Chair INTA’s Indigenous Rights Committee and sits on both their Asia Pacific Council and Advocacy Council. She previously served on their Board of Directors. Marion has also been a recipient of INTA's 'Volunteer Service Award for the Advancement of Trademark Law'. She is a member of the Marques IP Outer Borders Team chairing their Indigenous People’s Rights subcommittee. She is a co-author the Australian Chapter of Lexis Nexis' International Pharmaceutical Law and Practice, and was a co-editor of the JIPLP special issue on Indigenous intangible property rights.