Admitted to Bar: 1984

Appointed Senior Counsel: 1998

Floor Member Since: 1986

Memberships of professional associations:

• NSW Bar Association
• Taxation Institute of Australia

Mr Sullivan is listed in Chambers & Partners 2025 Global and Asia-Pacific rankings for Tax Law, and Doyle’s Guide 2025 as ‘Preeminent’ Tax Law Senior Counsel NSW. He is also recognised in Best Lawyers Australia 2026 for his work in Tax Law, and was named Best Lawyers Lawyer of the Year for Tax Law in 2023. Legal 500 recognises him as a Leading silk Band 1 in Commercial Disputes for 2025. Mr Sullivan is also recognised in the Lexology Index as a Global Elite Thought Leader in Tax; Advisory and Controversy.