New York attorney · Reg. #4391439

Mark Robert O'Siochain

Registered (registry: Currently registered)

Current employer

Guinan O Siochain Law Group · Omaha, NE · since at least September 2026

Admission

Admitted 2006, Third Department · NATIONAL UNIVERSITY IRELAND, DUBLIN

Employment history

• Guinan O Siochain Law Group · Omaha, NE · current

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