Willis has an extensive background in the legal information industry, having worked with large international law firms and corporate law departments on behalf of West Publishing, Thomson Reuters, the Bureau of National Affairs, and Bloomberg. Prior to his career in legal publishing, Willis practiced as a Staff Attorney with the Criminal Defense Division of the Legal Aid Society in Manhattan. He is a graduate of the Jacob D. Fuchsberg Law Center, where he was Editor-in-Chief of the Moot Court Board and a published member of the Law Review. Willis is a member of the Law Library Association of Greater New York and the New Jersey Law Library Association. He is admitted to practice in the state of New York.