Wheaton, Illinois


Phone (630) 653-5775
Fax (630) 653-5980

Margaret Sullivan joined Langhenry, Gillen, Lundquist & Johnson, LLC in 2020 as an associate attorney and works in the Wheaton office. Prior to joining the firm, Margaret focused her practice on insurance coverage disputes in state and federal court.  Margaret has represented policyholders and insurance carriers in various coverage matters involving commercial general liability and E&O coverage. After law school, Margaret has had the opportunity to work at another law firm and at a TPA for Underwriters at Lloyds of London. These opportunities have allowed Margaret to gain experience with insurance litigation, claims management and litigation management.

Margaret received her law degree from The John Marshall Law School in Chicago, Illinois in 2014. While in law school, she was a member of the editorial board for the John Marshall Journal of Information Technology and Privacy Law and Moot Court Honor Council. She also clerked for the Honorable Margaret Ann Brennan. Margaret completed her undergraduate education at DePaul University where she received her B.A. in economics and in political science.

Margaret is licensed to practice in Illinois and the Northern District of Illinois.