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 2024 Asia-Pacific rankings for Tax Law, and Doyle’s Guide 2024 as Preeminent Leading Tax Barristers Senior Counsel NSW.
He is also recognised in Best Lawyers Australia 2025 for his work in Tax Law, and was named Best Lawyers Lawyer of the Year for Tax Law in 2023.
The Legal 500 lists him as Leading silk Band 1 in Commercial Disputes for 2023.