Marvin J. Leavitt

Mr. Leavitt is a Founding Partner with Grund & Leavitt. He has litigated a number of high profile trials and appeals in both federal and state courts.

Before becoming a partner in the firm, he served as a judge in the Circuit Court of Cook County, Illinois and as a justice on the Illinois Appellate Court. This followed 20 years in a successful private practice. The Chicago Bar Association remarked when evaluating him that "he enjoys impeccable credentials" and the Chicago Council of Lawyers stated he "has outstanding legal ability, an excellent temperament…and is hard working," rating him highly qualified to serve in the judiciary. Not only has Mr. Leavitt tried hundreds of cases as a lawyer, he presided over thousands of matters as a judge and has authored opinions in almost every area of the law while a justice of the Appellate Court. Mr. Leavitt is a Grund & Leavitt, P.C. partner and has practiced law since 1976. Mr. Leavitt served as a member of the guest faculty for the University of Chicago Intensive Trial Advocacy Program; he was a participant/lecturer in numerous legal workshops, seminars and forums, and served as a judge for numerous moot court competitions and trial advocacy classes.

In March of 2020, The Illinois Practice of Family Law was published, a book authored by Mr. Leavitt, and partners Jody M. Yazici, and David Grund. This is the 19th edition of The Illinois Practice of Family Lawthe most widely used family law text by practitioners, judges, and law students in Illinois.

Representative Clients

Mr. Leavitt has a wide range of experience acting as trial counsel in numerous matrimonial, civil, and criminal cases. He has also argued a wide range of significant issues before The Appellate Courts and The Supreme Court.



Leavitt_Marvin_2017.jpg Leavitt_Marvin_2016.jpeg

Mr. Leavitt has served as an adjunct professor teaching Advanced Pleadings and Motion Practice in Family Law at the IIT/Chicago Kent College of Law in its LLM program. Additionally, since 2006, Mr. Leavitt has served as Co-Chairman of the Lawyers Committee. He also serves on The Rules Committee of the Illinois Supreme Court and the Domestic Relations Division Bar Procedure and Policy Committee.



Professional Associations

  • Illinois State Bar Association
  • Chicago Bar Association
  • Illinois Judges Association
  • Appellate Lawyers Association
  • Decalogue Society (former board member)