 He was hired by the U.S. Treasury Department in 1999 as an aide to General Counsel Neal S. Wolin and then as Acting Deputy General Counsel.While there he was credited by department officials with "crafting legislation that formed the basis" of Title III of the USA PATRIOT Act, dealing with money laundering.In 2001 he left the government and joined the Washington law firm Wilmer Cutler Pickering Hale and Dorr, now known as WilmerHale.