After receiving his law degree in 1984 from Washington College of Law, The American University, Bill served as law clerk to U.S. District Judge Robert C. Zampano in New Haven and then to U.S. Circuit Judge Carolyn Dineen King in Houston. He then joined Jacobs, Grudberg, Belt & Dow, P.C., in New Haven, where he handled a broad variety of cases including personal injury, commercial disputes, and criminal defense. In 2004, he started practicing with Koskoff Koskoff & Bieder, P.C., in New Haven and Bridgeport. At Koskoff, Bill concentrates on wrongful death, product liability, and personal injury cases. He has also been a member of the Criminal Justice Act panel in the U.S. District Court since 1986 and is a lecturer in trial practice at Yale Law School.
Bill also has litigated several election cases, most recently the absentee ballot fraud case leading to a new primary and election in Bridgeport. He also represented Common Cause and Connecticut Citizen Action Group in federal litigation that led to the overhaul of the state primary election system, and he represented the state comptroller, several members of the General Assembly, including in one case clarifying the roles of the courts and the General Assembly in election disputes, and two Governors.
Bill has been a member of the Federal Grievance Committee and two local panels of the Statewide Grievance Committee. He was appointed to a committee to improve defense services under the Criminal Justice Act and served twice on committees to recommend U.S. Magistrate Judge candidates.
In the community, Bill has been active with the Guilford Land Conservation Trust for over twenty years.He served on the Guilford Board of Education for twenty years, including fourteen years as its chairman.