Photo of John J. Mangan

John J. Mangan Member

Areas of Practice

Industries

Bar Admissions

  • Illinois, 1976

Court Admissions

  • U.S. Court of Appeals, 7th Circuit
  • U.S. District Court, Northern District of Illinois
  • Federal Trial Bar, Northern District of Illinois
  • U.S. Tax Court

Education

John Marshall Law School, J.D.

  • with distinction

University of Kansas, B.A.

Mr. Mangan is an experienced trial lawyer and business and commercial litigator, having tried over 75 complex civil cases to jury verdict in business, product liability and tort cases. Over the past 30 year span of his career he has represented both plaintiffs and defendants in jury, bench, arbitration, and appellate proceedings in federal and state courts.

Mr. Mangan has an active trial practice in Cook, DuPage, Kane, Will, Winnebago, DeKalb, Kankakee and McHenry counties, as well as in federal court.

His philosophy is that a cost-effective litigation strategy mandates that trial counsel be someone your opponent knows can, will, and has successfully tried cases to verdict.

Experience

  • Litigation of contractual disputes, tortious interference claims, trade secret, non-compete agreements, business tort litigation, and business workouts
  • Product liability including pharmaceutical and medical devices
  • Representation of hospitals, physicians and ambulatory surgical centers in professional liability, certificate of need and business litigation
  • ERISA related litigation on a number of issues
  • Shareholder, partner and related business ownership disputes and litigation
  • General business representation of corporations, physicians, hospitals, and ambulatory surgical centers
  • Peer review, credentialing and state disciplinary proceeding issues for physicians and health care entities
  • Premises liability litigation
  • Sinn v. Elmhurst Medical Bldg., Ltd., 243 Ill.App.3d 787, 612 N.E.2d 932, 184 Ill.Dec. 56 (Ill.App. 2d Dist., Apr 22, 1993) (No. 2-92-0357)
  • Testin v. Dreyer Medical Clinic, 238 Ill.App.3d 883, 605 N.E.2d 1070, 179 Ill.Dec. 56 (Ill.App. 2d Dist., Dec 18, 1992) (No. 2-92-0352)
  • Neuman v. Burstein, 230 Ill.App.3d 33, 595 N.E.2d 659, 172 Ill.Dec. 298 (Ill.App. 2d Dist., Jun 24, 1992) (No. 2-91-0903)
  • Comfort v. Wheaton Family Practice, 229 Ill.App.3d 828, 594 N.E.2d 381, 171 Ill.Dec. 529 (Ill.App. 2d Dist., Jun 03, 1992)( No. 2-91-0684)
  • Aimonette v. Hartmann, 214 Ill.App.3d 314, 574 N.E.2d 776, 158 Ill.Dec. 663 (Ill.App.2d Dist., Jun 07, 1991) (No. 2-90-0494)
  • Toepper v. Brookwood Country Club Road Ass'n, 204 Ill.App.3d 479, 561 N.E.2d 1281, 149 Ill.Dec. 585 (Ill.App. 2d Dist., Oct 05, 1990) (No. 2-89-1198)
  • Marianjoy Rehabilitation Hosp. v. Lo, 180 Ill.App.3d 49, 535 N.E.2d 1061, 129 Ill.Dec. 296 (Ill.App.2d Dist., Mar 03, 1989) (No. 2-88-0802)
  • Lovelace v. Four Lakes Development Co., 170 Ill.App.3d 378, 523 N.E.2d 1335, 120 Ill.Dec. 424 (Ill.App.2d Dist., May 19, 1988) (No. 2-87-0137)
  • DuPage Bank & Trust Co. v. DuPage Bank & Trust Co., as Trustee under Trust Agreement Dated February 15, 1978 and Known as Trust No. 2195, 122 Ill.App.3d 1015, 462 N.E.2d 25, 78 Ill.Dec. 309 (Ill.Ap. 2d Dist., Mar 29, 1984) (No. 83-345)
  • Speciale v. Seybold, 147 F.3d 612, 22 Employee Benefits Cas. 132 (7th Cir. (Ill.), Jun 22, 1998) (No. 97-3057)

Memberships & Involvement

  • Litigation Counsel of America, Fellow
  • American Bar Association, Health Care Section
  • Illinois State Bar Association, Health Law Section
  • Society of Trial Lawyers
  • DuPage County Bar Association
  • Will County Bar Association

Community/Civic Activities

  • Village of Hinsdale Plan Commission, Member, 1984-1988
  • Parent Committee Young Life for Eastern DuPage County, Past Member

Named a Leading Lawyer in the areas of Health and Medical Malpractice Defense by the Leading Lawyers Network, 2007-2017, Law Bulletin Publishing Company

Recognized in Illinois Super Lawyers® for Business Litigation, Personal Injury Defense: Medical Malpractice, and Personal Injury Defense: Products, 2013-2018

Recipient of an AV® Preeminent™ Rating by Martindale-Hubbell