William "Butch" Cullen is a partner with the Structured Finance Group in Orrick’s New York office. His practice focuses on securities and structured finance, with an emphasis on the securitization of financial assets, in particular, commercial mortgage assets.

Prior to joining Orrick, Butch was a partner in the New York offices of Kaye Scholer LLP, Thacher Proffitt & Wood LLP and Sidley Austin LLP.