Lex Mentis™Attorney Check

New York attorney · Reg. #4248217

Colin Casey O'Brien

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

Current employer

Earthjustice · San Francisco, CA · since at least September 2026

Admission

Admitted 2004, First Department · YALE

Employment history

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.