Sorin A. Leahu
sleahu@leahulaw.com - (847) 529-7221
Leahu Law Group, LLC was founded by Sorin A. Leahu. Prior to starting the firm, Leahu worked at two nationally-recognized law firms representing individuals, businesses, and nonprofits across the country. Consistently recognized by Super Lawyers as a top rated civil litigation attorney (2023-2026), Leahu’s practice focuses on commercial litigation, land use and zoning, employment litigation, and civil rights litigation. In addition, he regularly litigates cases before federal courts in the areas of free speech, the establishment clause, the free exercise clause, class actions, and various election law matters. On the business side, Leahu serves as an advisor and outside general counsel to businesses and nonprofit organizations across the country.
Leahu has served as the Chairman of the Chicago Bar Association Civil Rights and Constitutional Law Committee, is a volunteer attorney with Administer Justice, and serves on the board of the Chicago Chapter of the Christian Legal Society. Leahu received his Juris Doctor from the University of Illinois at Chicago Law School in 2014, where he graduated third in his class and was awarded the Order of John Marshall—a local Order of the Coif to recognize excellence in scholarship. While in law school, he was a member of The John Marshall Law Review, a Quarterfinalist in the Herzog Moot Court Competition, and also worked with both federal and state judges, as well as with the office of the Illinois Attorney General. Leahu is also a Blackstone Legal Fellow and an Allied Attorney with the Alliance Defending Freedom.
Leahu previously served as an editor of the Harvard Journal of Law & Policy in its publication of the 2013 Federalist Society Student Symposium, and has presented and written on a variety of legal topics, including: “Preserving Free Speech in Traditional Public Forums: The Fight for Free Speech in Millennium Park” at the Chicago-Kent College of Law; the Illinois Institute for Continuing Legal Education–Not-for-Profit Corporations (2017), Chapter 1—Organizing an Illinois Not-for-Profit Corporation (with Michael P. Mosher); and “Combatting Religious Discrimination Today- Roundtable Discussion on RLUIPA and Construction of Places of Worship” at the Office of the United States Attorney for the Eastern District of Michigan in Detroit. Leahu received his Bachelor of Science in Business and Economics, summa cum laude, from North Park University, Chicago, in May 2010.
Andrew S. Willis
awillis@leahulaw.com - (708) 603-7630
Andrew Willis has extensive experience in estate planning, trust and estate administration, and trust and estate litigation. Prior to joining the Leahu Law Group, he worked at several national law firms, assisting clients across the wealth spectrum with their tax, corporate, and estate planning needs. In 2026, Andrew was recognized by Super Lawyers as a Rising Star in Estate Planning and Probate. His diverse legal background also includes business succession, First Amendment litigation, trademarks, zoning, and corporate law.
Andrew earned his law degree from Chicago-Kent College of Law, where he served as an Executive Articles Editor for the Chicago-Kent Law Review and was president of the Federalist Society and the Christian Legal Society student chapters. During law school, externed for Justice Bertina Lampkin of the Illinois Appellate Court, the Illinois Attorney General’s Office, and the Liberty Justice Center. He holds a bachelor’s degree from Liberty University. Andrew is a Blackstone Legal Fellow and an Allied Attorney with the Alliance Defending Freedom.
Andrew lives in Chicago, Illinois and enjoys camping, pick-up basketball, and prodding on his Chicago Bears.
Education
Liberty University (B.S.), Summa Cum Laude
Chicago-Kent College of Law (J.D.), Cum Laude
Admissions
Illinois (2019)
United States District Court - Northern District of Illinois
United States Court of Appeals for the Seventh Circuit
Community Involvement
Administer Justice Legal Aid Clinic, Volunteer Attorney
Courtside Ministries, Board Member
Federalist Society Chicago Young Lawyers Chapter, President
Speaking Engagements
Purpose Trusts (with Susan Bart), Chicago Bar Association Trusts and Estates Committee (May 2025)
Complex Issues in Estate Administration, National Business Institute (June 2024)
Ethics and Estate Administration, National Business Institute (June 2024)
Probate Disputes and Litigation, National Business Institute (March 2025)
Ethics in the Illinois Probate Process, National Business Institute (March 2025)
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