Sheldon T. Zenner served as National Chair of Katten's Litigation Department, overseeing approximately 200 lawyers across the country and for over 25 years was the firm's National Chair of the White Collar Litigation Practice Group. He concentrates his practice in white collar criminal and civil litigation and is involved in a range of matters involving securities, financial services, antitrust, healthcare, education and tax issues. He regularly counsels Boards of Directors, Audit Committees and Special Committees on compliance and corporate governance issues and, over his 38 year career, has represented countless companies and executives in both internal and external criminal and civil investigations and lawsuits.
Mr. Zenner also focuses his practice on corporate compliance, assisting businesses to establish effective compliance programs. Mr. Zenner has conducted numerous internal investigations on behalf of Board committees and corporate legal departments. He has extensive experience negotiating on behalf of companies and executives with the Department of Justice, the SEC, U.S. Attorney’s offices throughout the country and various Offices of the Inspector General.
In addition, Mr. Zenner has served as adjunct faculty member at Northwestern University School of Law and lectures at the Corporate Counsel Institute, ABA's National Institute on Securities Fraud, and the University of Chicago.
Mr. Zenner graduated from Northwestern University in 1974 with Honors and Distinction in Political Science. He thereafter earned his law degree, cum laude, from Northwestern University School of Law in 1978, where he was on the staff of the Journal of Criminal Law and Criminology.
Upon graduating from law school, Mr. Zenner clerked for Judge Marvin E. Aspen in the U.S. District Court for the Northern District of Illinois. After his clerkship, Mr. Zenner joined the United States Attorney’s Office in Chicago as an Assistant United States Attorney where he held various senior supervisory positions. In that capacity, Mr. Zenner was actively involved in numerous complex federal trials involving sophisticated financial transactions, RICO, securities fraud, and political corruption. Mr. Zenner left the U.S. Attorney’s Office as the Deputy Chief, Special Prosecutions Division to join the Firm.
Mr. Zenner has regularly been included among The Best Lawyers in America (1995-2012) and in the annual listing of Leading Business Lawyers in Illinois. He is listed in Chambers USA: America’s Leading Lawyers for Business (2007-2012) as a leader in his field; Illinois Super Lawyers (2005-2012); 2008-12 Super Lawyers, Corporate Counsel Edition. In addition, the Firm’s White Collar Criminal and Civil Litigation Practice is ranked among the nation’s best by Chambers USA. His trials and investigative skills both as a prosecutor and as a defense lawyer have been chronicled in seven books and two films.