Zimmerman Law Offices, P.C., represent plaintiffs and defendants in commercial transactions, commercial litigation, contract disputes and real estate litigation. Thomas A. Zimmerman is a seasoned litigator who has represented major corporations in commercial litigation, as well as settling disputes for small companies across the Greater Chicago area. br br Visit Us: br br br br br br Contact Us: br 77 W Washington St, Suite 1220 br Chicago, IL - 60602.