Mark Walsh was admitted as a barrister of the Supreme Court of New South Wales in 1994, and took silk in 2015. His areas of practice include general litigation, commercial disputes, contract, tort, medical negligence, professional negligence, insurance law and coronial proceedings. Mark has a particular interest in factual disputes,evidence, causation, statutory interpretation, the operation of WCA s151Z in common law proceedings, collateral source recoveries and suggesting practical solutions to “interesting” legal problems.

Mark is a member of the New South Wales Bar Association's Costs and Fees Committee. Mark is a contributing author to Thomson Reuters’ Civil Practice and Procedure, including the provisions on evidence and expert evidence in Part 31. He regularly lectures on litigation at seminars conducted by the University of New South Wales, including the Litigation Master Class series.

Mark has been recognised in Best Lawyers for professional negligence since 2017 and in Doyle's Guide as a recommended senior counsel in Leading Commercial Litigation & Dispute Resolution Barristers – Canberra, since 2020.