Sullivan william sized for website 12.17.15

William G. Sullivan

Of Counsel


130 E. Randolph St.
Suite 3900
Chicago, IL 60601
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Fax: 312.517.7576
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J.D., with Honors, Chicago-Kent College of Law, Illinois Institute of Technology, Chicago, Illinois, 1978
State Bar Licenses
Court Admissions
U.S. District Ct., N.D. of Illinois
U.S. District Ct., N.D. of Illinois Trial Bar
U.S. District Ct., C.D. of Illinois
U.S. Tax Court
U.S. Court of Appeals, 5th Circuit
U.S. Court of Appeals, 7th Circuit
U.S. Court of Appeals, 11th Circuit
U.S. Supreme Court

William G. Sullivan

Of Counsel

William G. Sullivan is Of Counsel in the Litigation Practice Group in the Clark Hill Chicago office. William tries cases. He has over 35 years of experience trying cases in both state and federal courts. His practice is divided almost equally between representation of plaintiffs and defendants, including companies of all sizes and individuals.  William has represented defendants in civil and criminal securities and antitrust cases and both civil and criminal RICO cases. He also has served as plaintiff’s counsel in civil RICO cases. He has litigated more than 100 contested hearings involving temporary restraining orders and preliminary injunctions. As plaintiff’s counsel, William has successfully prosecuted dozens of civil fraud cases and represented clients in civil rights actions and trade secrets. He has guided individuals and businesses through corporate governance and compliance issues involving state and federal regulatory agencies. He has represented clients in Foreign Corrupt Practices Act and World Bank investigations. He has tried cases in the U.S. Tax Court with other members of his office that have resulted in the savings of hundreds of millions of dollars. 
Prior to joining Clark Hill, William was a founding principal of Martin, Brown, Sullivan, Roadman & Hartnett, Ltd. During his 26 years with the firm he tried cases in state courts, United States District Courts and the United States Tax Court. He also represented clients in the Illinois Appellate Court and the United States Courts of Appeals for the 5th, 7th and 11th Circuits. 

William has served in the Office of the Illinois Attorney General.  He served as Chief of both the General Law and Consumer Protection Divisions and was appointed Chief of the Toxic Waste Strike Force.  He also supervised the Public Utilities and Anti-Trust Divisions. Since leaving the Illinois Attorney General's Office he has been appointed by the four successor attorneys general as a special assistant attorney general. He has litigated cases in the state and federal courts on behalf of the state of Illinois, including a class action in which he represented the Illinois Toll Highway Authority.

William is a member of the Board of Directors of Marquette Bank and of Marquette National Corporation, a bank holding company. He serves on the Audit Committee, the Nominating and Corporate Governance Committee and Asset and Liabilities Committee of those institutions. He chairs the Compliance and Regulatory Committee. He is a member of the Nominating and Corporate Governance Committee (2010 - present) and Audit Committee (2010 - present).

Author of the following statutes:

  • Travel Promotion Consumer Protection Act, 720 ILCS 350/1
  • Illinois Burial Rights Act, 820 ILCS 135/1
  • Aggravated Stalking Law, 720 ILCS 5/12-7.4
Chicago Bar Association
American Bar Association
Marquette Bank, Chicago, Illinois: Chair Compliance and Regulatory Committee (2015-present), Director Asset/Liability Committee (1994-present), Member Trust Committee (Chair 2004-2009)

Bill’s client and the client’s former colleague were sentenced last week in the United States District Court for the District of New Jersey. The client and his colleague were accused of orchestrating $3.9 million in bribe payments to foreign officials in various countries in order to secure government contracts for their company. The client pled guilty to one count of conspiracy to violate the Foreign Corrupt Practices Act, and one substantive count of violating the Foreign Corrupt Practices Act. The client was sentenced to two years of probation and received a $10,000 fine. As a result, he will go home to the Philippines. The Sentencing Guidelines called for a sentence of 57 to 60 months.