New York attorney · Reg. #5623731

Brendan Donal O'Callaghan

Registered (registry: Currently registered)

Current employer

Department of Justice, United States Attorney S Office for the District of Columbia · Washington, DC · since at least September 2026

Admission

Admitted 2018, Third Department · George Washington University Law School

Employment history

• Department of Justice, United States Attorney S Office for the District of Columbia · Washington, DC · 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.