Gilbert Marcus was admitted to the Johannesburg Society of Advocates in July 1983 and took silk in 1996. His preferred areas of practice include constitutional and administrative, public regulation, competition, media and telecommunications, as well as human rights law. Gilbert has appeared in the Constitutional Court and Supreme Court of Appeal and has acted as judge at the High Court and Labour Court. He has also been admitted to the bar in Lesotho, Swaziland, England and Wales (as non-practising solicitor) and is an associate tenant at Doughty Street Chambers in London.
Gilbert is an Honorary Professor of law at the University of the Witwatersrand and has written numerous articles on a wide range of subjects. He holds BA LLB and LLM qualifications.