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  1. Professionals

Marc Krickbaum

Partner

Co-Chair, Government Investigations, Enforcement, and Compliance

Chicago

+1 312-558-3787

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  • Overview
  • Experience
  • Credentials
  • Insights & News

Marc is a former U.S. Attorney and a distinguished trial and appellate lawyer. His practice focuses on white collar criminal defense, internal investigations, and complex civil litigation, where he uses his deep experience to help businesses and individuals navigate their most difficult legal challenges.

Global Co-Chair of the firm’s Government Investigations, Enforcement, and Compliance Practice, Marc has represented companies and individuals in white collar criminal matters, internal investigations, and civil litigation involving allegations of fraud, insider trading, public corruption, and theft of trade secrets. He also has significant experience in matters relating to the False Claims Act, the Foreign Corrupt Practices Act, sanctions and export control, and national security litigation.

Before joining Winston, Marc served in several senior positions at the U.S. Department of Justice (DOJ). Most recently, Marc served as Deputy Special Counsel, supervising the investigation of classified documents found in the home and office of President Biden.

Marc previously served as the U.S. Attorney for the Southern District of Iowa, where he oversaw all federal criminal and civil litigation in that district. In addition to his management role, Marc personally handled prosecutions as U.S. Attorney, tried multiple cases to verdict, and briefed and argued several appeals.

Before becoming U.S. Attorney, Marc served for nearly a decade as an Assistant U.S. Attorney in Chicago and in the Southern District of Iowa, where he served as Chief of Appeals. Earlier in Marc’s career, he served as an advisor to top DOJ leadership as counsel to the Deputy Attorney General.

After law school, Marc clerked for the Honorable Steven M. Colloton of the United States Court of Appeals for the Eighth Circuit, and the Honorable Mark Filip of the United States District Court for the Northern District of Illinois.

Key Matters

    • Represented a Fortune 500 financial services firm in a DOJ and SEC investigation of alleged insider trading by a company employee
    • Conducted internal investigations for a publicly-traded manufacturing company relating to alleged accounting fraud and bribery
    • Represented a privately-held agricultural company and owner in a federal criminal investigation of alleged fraud
    • Conducted an internal investigation for a Fortune 100 insurance company in a matter involving a state Attorney General’s Office
    • Conducted an internal investigation for an aerospace manufacturer relating to a fatal helicopter accident
    • Represented a CEO in a federal criminal investigation of alleged campaign finance offenses
    • Conducted an internal investigation for a health care services company relating to alleged embezzlement by company officer
    • Represented an executive in an SEC investigation of alleged earnings manipulation
    • Represented an executive in a real estate investment firm in a federal criminal investigation alleging fraud
    • Represented a federal prisoner in an appeal successfully overturning his mandatory life sentence

Marc was named to the 2025 Lawdragon 500 Leading Lawyers in America list.

Capabilities

Government Investigations, Enforcement & Compliance
Litigation/Trials
Appellate & Critical Motions
Compliance Programs
Crisis Management
Government Program Fraud, False Claims Act & Qui Tam Litigation
Tax Controversy & Criminal Tax

Key Matters

    • Represented a Fortune 500 financial services firm in a DOJ and SEC investigation of alleged insider trading by a company employee
    • Conducted internal investigations for a publicly-traded manufacturing company relating to alleged accounting fraud and bribery
    • Represented a privately-held agricultural company and owner in a federal criminal investigation of alleged fraud
    • Conducted an internal investigation for a Fortune 100 insurance company in a matter involving a state Attorney General’s Office
    • Conducted an internal investigation for an aerospace manufacturer relating to a fatal helicopter accident
    • Represented a CEO in a federal criminal investigation of alleged campaign finance offenses
    • Conducted an internal investigation for a health care services company relating to alleged embezzlement by company officer
    • Represented an executive in an SEC investigation of alleged earnings manipulation
    • Represented an executive in a real estate investment firm in a federal criminal investigation alleging fraud
    • Represented a federal prisoner in an appeal successfully overturning his mandatory life sentence

Credentials

Education

Marc received his B.A. with highest distinction from the University of Iowa in 2001, and he received his J.D., cum laude, from Harvard Law School in 2006.

    Admissions
    • Iowa
    • Illinois
    Clerkships
    • USCA - Eighth Circuit for the Honorable Steven M. Colloton
    • USDC - Northern District of IL for the Honorable Mark Filip
    • USCA - Eighth Circuit for the Honorable Steven M. Colloton
    • USDC - Northern District of IL for the Honorable Mark Filip

    Related Insights & News

    Speaking Engagements

    • “Best practices for calling expert witnesses at trial,” U.S. Attorney’s Office for Southern District of Iowa (2021)
    • “When police break the law: Prosecution of law enforcement under federal civil rights laws,” Iowa Law Enforcement Academy (2020)
    • “An introduction to cognitive bias for prosecutors,” U.S. Attorney’s Office Southern District of Iowa (2020)
    • “Federal prosecution of hate crimes,” Iowa NAACP hate crimes forum (2020)
    • “Federal prosecution and priorities,” FBI Citizen’s Academy (2020, 2018)
    • “Investigating and prosecuting a child sex predator: a case study,” Iowa Sex Crimes Conference (2019)
    • “Basic principles of legal writing,” U.S. Attorney’s Office Southern District of Iowa (2019)
    • “Advocating for victims of crime,” Iowa Victim Specialist Conference (2019)
    • “Protecting places of worship,” Iowa Forum (2019)
    • “DOJ corporate charging policy after the Yates Memo,” Iowa Bar Association (2017)
    • “Theft of trade secrets,” Iowa Bar Association (2017)
    • “The Sessions memo and DOJ charging policy,” Iowa Federal Practice Seminar (2017)
    • “The proper use of Rule 404(b) evidence at trial,” U.S. Attorney’s Office for Southern District of Iowa (2015)
    • “An introduction to the Bail Reform Act,” U.S. Attorney’s Office for Southern District of Iowa (2015)
    • “Human trafficking 101” (numerous presentations)
    Blog
    Rebalancing the Sticks and the Carrots? A New DOJ White-Collar Enforcement Plan

    May 20, 2025

    Recognitions
    Winston Attorneys Featured on the 2025 Lawdragon 500 Leading Lawyers in America List

    January 14, 2025

    Pro Bono In Action
    Two Consecutive Winston Wins Give Client Serving Life Sentence a Chance for a Life Outside of Prison

    November 21, 2024

    In the Media
    Marc Krickbaum Returns to Winston & Strawn in Chicago Office

    June 5, 2024

    Press Release
    Litigation Partner Marc Krickbaum Returns to Winston & Strawn After Stint as Deputy Special Counsel

    June 3, 2024

    View All Insights & News

    Capabilities

    Government Investigations, Enforcement & Compliance
    Litigation/Trials
    Appellate & Critical Motions
    Compliance Programs
    Crisis Management
    Government Program Fraud, False Claims Act & Qui Tam Litigation
    Tax Controversy & Criminal Tax
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