New York attorney · Reg. #4708780

William Sei-Hyun Yoon

Registered (registry: Currently registered)

Current employer

Law Office of William S. Yoon, Esq. · Bayside, NY · since at least September 2026

Admission

Admitted 2009, Second Department · Brooklyn Law School

Employment history

• Law Office of William S. Yoon, Esq. · Bayside, 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.