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John P. Sieger

Chicago Office

John P. Sieger is the national head of Katten's Insolvency and Restructuring practice. He has been involved in many high-profile insolvency proceedings throughout the country, including the bankruptcy proceedings of the Chicago Tribune, Exide Technologies, Conseco, United Airlines, Sentinel Management Group, Monitor Consulting Group, South Texas Oil, TLC Vision, Montgomery Ward, Thornburg Mortgage, Inc. and Cadence Innovation.

Described as "very grounded" (Chambers USA), John has represented debtors and creditors in fields from automotive supply to financial services to energy for more than 20 years. He has resolved hundreds of reorganization cases, both in adversarial proceedings and out-of-court workouts. His litigation experience extends to a variety of federal courts from the district and circuit levels all the way to the US Supreme Court, where Katten represented the larger of two senior lenders in In re RadLAX, the landmark case in which the Court unanimously endorsed credit-bid rights in bankruptcy plans.

John’s out-of-court experience includes numerous Uniform Commercial Code foreclosure sales, assignments for the benefits of creditors, restructurings and bankruptcy-remote entities. His efforts to minimize risk and maximize long-term value for his clients involve the analysis and implementation of various securitization and realization techniques. He has a reputation for finding creative solutions and minimizing cost and delay.

Shown below is a selection of John’s engagements.


Legal 500, 2016–2019
Super Lawyers, Illinois, 2008–2019
Chambers USA, 2013–2019
Best Lawyers in America, 2011–2019

Chicago Turnaround Management Association

Chicago Turnaround Management Association, Transaction of the Year, 2004, 2007

The M&A Advisor

The M&A Advisor, “Deal of the Year” Award, 2004
Firm News
John P. Sieger


  • JD, University of Michigan Law School
  • BS, University of Illinois

Bar Admissions

  • Illinois

Court Admissions

  • US Supreme Court
  • US Court of Appeals, Third Circuit
  • US Court of Appeals, Seventh Circuit
  • US District Court, District of Colorado
  • US District Court, Central District of Illinois
  • US District Court, Northern District of Illinois, Trial Bar
  • US District Court, Eastern District of Michigan
  • US District Court, Western District of Wisconsin
  • US District Court, Eastern District of Wisconsin


Legal 500
Super Lawyers
Illinois, 2008–2019
Chambers USA
Best Lawyers in America

Chicago Turnaround Management Association

Transaction of the Year, 2004, 2007

The M&A Advisor

“Deal of the Year” Award, 2004
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