mark-maciolek - Maciolek Law Group

Mark P. Maciolek


Attorney Mark P. Maciolek is of counsel to Maciolek Law Group’s Dane County office.
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Litigation Percentage

100% of practice devoted to litigation

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Bar Admission

Wisconsin 2005

Attorney Mark P. Maciolek is of counsel to Maciolek Law Group’s Dane County office. In practice since 2005,his practice is primarily focused on  criminal defense in Wisconsin state and federal courts. Mark P. Maciolek handles trials and appeals. s. He also has a civil litigation practice, representing clients in trials and appeals in state and federal civil matters. 

Attorney Mark Maciolek has successfully defended clients against white-collar crimes, firearms crimes, and drug crimes. He combines his experience and knowledge of legal strategy with a deep understanding of each client’s case to craft compelling arguments that stand out in state and federal courts.

A tenacious attorney, Attorney Maciolek has secured jury trial victories over established state court prosecutors, an award-winning civil litigator, and a senior federal prosecutor. He is committed to defending his clients against even the most daunting criminal and civil allegations.


  • University of Wisconsin Law School, Madison, WI
    • J.D. – 2005
  • University of Wisconsin, Madison, WI
    • B.A. – 2000

Honors & Awards

  • Best Lawyers in America – Criminal Defense: White-Collar, and Criminal Defense: General Practice 2024
  • Super Lawyers – Rising Star 2014–2017
  • Avvo – rated 10.0; 5.0 client reviews

Professional Associations and Memberships

  • Wisconsin Association of Criminal Defense Lawyers
  • National Association of Criminal Defense Lawyers
  • Association of Certified E-Discovery Specialists
  • James E. Doyle American Inn of Court

Practice Areas

  • Criminal defense (state and federal trials and appeals)
  • Civil litigation in state, federal, and bankruptcy courts (no tenant-landlord, family law, or plaintiff personal injury cases)


  • English
  • Spanish
  • Brazilian Portuguese

Bar Admissions

  • Supreme Court of the United States
  • Supreme Court of Wisconsin
  • Western District of Wisconsin
  • Eastern District of Wisconsin
  • Western District of Wisconsin – Bankruptcy Court
  • Eastern District of Wisconsin – Bankruptcy Court
  • Court of Appeals for the Seventh Circuit

Notable Cases

  • United States of America v. Chad Schampers, 2023: Dismissal of two indictments (one for Paycheck Protection Program fraud and one for wire fraud)
  • State of Wisconsin v. Kevin Scott, 2022: Jury trial acquittal, first-degree recklessly endangering safety
  • William Street v. Rodney Hutchins, 2022: Successfully defended client against civil suit for battery
  • Pre-charge insider trading investigation, 2022: Convinced assistant United States attorney to decline to charge client investigated for insider trading
  • State ex. rel. Joshua Kaul v. Frederick Prehn, 2021: Successfully defended client against a petition for a writ of quo warranto, petition dismissed by the circuit court and dismissal upheld by Supreme Court of Wisconsin
  • Pre-charge insider trade secrets investigation, 2020: Convinced assistant United States attorney to decline to charge client investigated for trade secret theft
  • Andringa v. Acker, 2020: Successfully defended client against fraud complaint
  • United States v. Cedez Honguyen, 2019: Acquittal for client facing two fraud indictments
  • Pre-trial sexual assault investigation, 2019: Case dismissed against an immigrant accused of sexual assault


  • 750 Windsor Street, #207, Sun Prairie, WI 53590
  • Direct Phone: 608-403-3252

Contact Info

Maciolek Law Group

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