Official NY OCA attorney registration data · Updated 2026 Methodology Discipline records

Brian Yoonsuk Sung

Currently registered

Brian Yoonsuk Sung is an attorney admitted to the New York State Bar in 2001, with a registered practice address in New York, New York. According to the New York Office of Court Administration, the current registration status on record is Currently registered.

Registration number4017570
Bar statusCurrently registered
Year admitted2001
Judicial departmentDepartment 1
Law schoolColumbia University
Practice cityNew York, NY
CountyNew York
Firm / organizationHaynes And Boone, Llp
Office address30 Rockefeller Plz Fl 26, New York, NY, 10112
Phone(212) 659-4964
Next registration dueJul 2027

About Haynes Boone

Haynes and Boone, LLP, which markets itself as Haynes Boone, is a business-oriented law firm whose origins lie in Texas. Its offices span several U.S. states as well as London, Mexico City and Shanghai, and its work covers corporate transactions, finance, litigation, intellectual property, energy, real estate, restructuring and regulatory matters.

Practice areas of Haynes Boone:

Banking & Finance Bankruptcy & Restructuring Commercial Litigation Corporate & M&A Employment & Labor Insurance Intellectual Property Real Estate Securities & Capital Markets Tax White Collar & Investigations

These are the practice areas the organization describes on its website. They are not a statement about Brian Yoonsuk Sung’s own practice or any specialty certification.

View the Haynes Boone profile and its 106 registered attorneys →

Office location

Registered office address on file with the New York State Bar. Verify before visiting, as the address reflects the contact on record and may be a firm rather than a personal office.

Verify this record

Bar status can change at any time. For the authoritative, real-time status of Brian Yoonsuk Sung, confirm directly through the official New York Attorney Search using the registration number above. This record is republished from public New York State data and is provided for reference only — it is not legal advice and not an endorsement.

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