Maria G. Antoniolli, or ‘Gabby’, began her legal career as an Assistant State’s Attorney with the DuPage County State’s Attorney’s Office where she spent her time there years in various units throughout the office, gaining significant trial experience in a wide variety of cases. As a prosecutor, Gabby handled traffic and misdemeanor cases, including: DUIs, domestic batteries, and orders of protections. From there, she was promoted to the Felony Juvenile Division where she managed hundreds of juvenile cases from intake to disposition. During her time in this division, she worked closely with DCFS and became well-versed in the various aspects of cases involving abused, neglected, and dependent minors. Gabby also worked in the Felony Trial Division where she handled serious felony cases ranging from aggravated DUIs, burglaries, serious drug offenses, aggravated batteries, and gun charges.

Since entering private practice, Gabby has concentrated her legal practice in both criminal defense and family law matters, including child custody and visitation, child support, alimony and spousal support, relocation, orders of protection, and prenuptial/postnuptial agreements. Gabby is also a certified Guardian ad Litem and has served in this capacity in family law cases as well as in the juvenile court system, assisting the court in cases involving abused, neglected, and dependent minors.

Gabby’s extensive courtroom and trial experience has shaped her into an innovative and zealous advocate who is highly effective at developing case strategies in order to achieve the best possible outcome for her clients. From engaging in negotiations to litigating a case at trial, Gabby tackles each and every case with tenacity and an analytical mindset, while keeping the client fully informed every step of the way.

Memberships & Recognitions

  • DuPage Association of Women Lawyers, Third VP
  • DuPage County Chapter of the Justinian Society of Lawyers, Second VP


McSwain Nagle Giese & Rapp, P.C. | Wheaton, IL
Partner, 2022-2023
Associate Attorney, 2020-2022

Mullen Winthers & Cerny, P.C. | Winfield, IL
Associate Attorney, 2018 –2020

DuPage County State’s Attorney’s Office | Wheaton, IL
Assistant State’s Attorney, 2012 – 2017
Law Clerk, 2009-2012
Legal Secretary, 2008-2009
Intern, 2004-2008

Cook County State’s Attorney’s Office | Chicago, IL
Law Clerk, 2011-2012


Certified Guardian Ad Litem
JD Certificate in Trial Advocacy
JD Certificate in Alternative Dispute Resolution


  • The John Marshall Law School - J.D. - 2012
  • University of Illinois - B.A. Political Science - 2008

    2004 – 2008


Integrity, knowledge, and experience. Highly recommend Axel Cerny!

Sophia Markopoulos Whalen

Axel Cerny is a polished professional and a great communicator. He walked with my wife and I through every step of the legal services he provided to us. Highly recommend.

Ian McGregor

Worked with Axel Cerny and team to get my first house. They did a great job helping me through the processes and guiding me through close. Would highly recommend!

Dan May

Axel Cerny was able to help with a real estate matter quickly and efficiently. His guidance through the matter was excellent and the results were exactly what we needed.

Jason Tartaglia

It's been about a year now since the first time I looked to Mullen and Winthers for legal advice. They are timely, clear, and thorough. As a result, they have very quickly earned my respect and future business.

Erik Russo

Contact Us

  1. 1 Complimentary Consultations
  2. 2 Over 50 Years of Combined Experience
  3. 3 Committed to Your Legal Needs
Fill out the contact form or call us at 630.668.6700 to schedule your initial consultation.

Leave Us a Message

We Accept Online Payments