New York attorney · Reg. #5951595

Shannon Duignan O'Brien

Registered — renewal due (registry: Due to reregister within 30 days of birthday)

Current employer

Mahon, Mahon, Kerins & O'Brien, LLC · Garden City South, NY · since at least September 2026

Admission

Admitted 2022, Second Department · St. Johns University School of Law

Employment history

• Mahon, Mahon, Kerins & O'Brien, LLC · Garden City South, NY · current

Compiled from NYS Office of Court Administration registration records, published NY Appellate Division decisions, and SEC orders against attorneys; current as of October 2026. Not an official record; verify with the NY Courts Attorney Search.