Jonathon Byrer

312 641 9750
• Main Line
800 678 9529
• Toll Free
Chicago, Illinois

Jonathon Byrer is an attorney in Korein Tillery’s Chicago office, licensed to practice in Illinois, the United States District Court for the Northern District of Illinois, and the United States Court of Appeals for the Seventh Circuit, and is an expert in appellate briefing, practice, and procedure.

In 2004, Mr. Byrer graduated magna cum laude with a B.A. in Philosophy and English from the University of Notre Dame, where he was elected to the international English honor society Sigma Tau Delta and received multiple awards for outstanding service and leadership in the University’s band program.  Mr. Byrer then attended the University of Chicago Law School, where he received his J.D. with honors in 2007.  Following law school, Mr. Byrer clerked for Justices Alan Page, Helen Meyer, Sam Hanson, and Christopher Dietzen on the Minnesota Supreme Court.  Afterward, Mr. Byrer clerked for Judge David F. Hamilton on the United States Court of Appeals for the Seventh Circuit.  

Following his clerkships, Mr. Byrer spent nearly a decade as appellate counsel for the City of Chicago, where he focused on complex, high-stakes litigation, briefing dozens of appeals before the Seventh Circuit and Illinois courts on matters involving police misconduct, federal civil rights, the First Amendment, regulatory takings, the Fair Labor Standards Act, the federal False Claims Act, the Age Discrimination In Employment Act, the Freedom of Information Act, administrative law, and election law.  Mr. Byrer also authored multiple certiorari-stage documents in the United States Supreme Court, where he also co-authored an amicus brief on behalf of a coalition of dozens of municipalities challenging the constitutionality of President Trump’s international travel ban in Trump v. Hawaii.  Most recently, Mr. Byrer served as the City’s lead appellate counsel as it challenged a $44.7 million police misconduct verdict – currently, the largest such verdict in Illinois history.

Among Mr. Byrer’s notable successes:  

  • Allen v. City of Chicago (7th Cir), successfully defended verdict in Fair Labor Standards Act collective action alleging that City failed to pay millions of dollars of overtime spent working on mobile phones;

  • Boyd v. City of Chicago (7th Cir.), obtained dismissal of appeal in $22 million wrongful conviction suit;

  • Callahan v. City of Chicago (7th Cir.), successfully defended summary judgment in multimillion-dollar class action lawsuit claiming that the City’s regulation of the taxi industry created a compensable employment relationship for purposes of the Fair Labor Standards Act;

  • City of Chicago v. City of Harvey (Ill. App.), successfully defended appointment of receiver to monitor City of Harvey’s maintenance of its local water system for the benefit of its residents;

  • Hall v. City of Chicago (7th Cir.), successfully defended summary judgment in multimillion-dollar False Claims Act lawsuit relating to federal law enforcement grants;

  • Houlihan v. City of Chicago (7th Cir.), successfully defended summary judgment and jury verdict in lawsuit claiming that former Mayor Rahm Emanuel selected his personal security detail in violation of United States Constitution;

  • Left Field Media v. City of Chicago (7th Cir.), successfully defended constitutional challenge to City regulations governing peddling activity around Wrigley Field;

  •  Locasto v. City of Chicago (Ill. App.), overturned $2 million default judgment, establishing new Illinois precedent regarding the propriety of default as a discovery sanction.


Mr. Byrer currently resides in Chicago’s South Loop with his wife Michelle and their son Joshua.  He and his wife are avid Notre Dame football fans; in the offseason, they can often be found hiking on the Chicago area’s many outdoor trails.

505 North 7th Street, Suite 3600 St. Louis, MO 63101


© 2020 by Korein Tillery.

All rights reserved.