New York attorney · Reg. #6269898

Riley Patrick O'Brien

Registered (registry: Currently registered)

Current employer

Sidley Austin LLP · Boston, MA · since at least September 2026

Admission

Admitted 2026, Third Department · University of British Columbia Faculty of Law

Employment history

• Sidley Austin LLP · Boston, MA · 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.