HeplerBroom Attorney Sean Sheehan


Sean P. Sheehan focuses his practice on trials involving complex litigation matters, including toxic torts, personal injury, wrongful death, and asbestos products, premises, supplier, distributor, contractor, and employer liability. He routinely represents clients in Madison, St. Clair, Cook, and outlying counties in Illinois; the City of St. Louis, Jackson, and outlying counties in Missouri; and various other courts throughout the country. He also counsels on issues involving compliance with Medicare Secondary Payer reimbursement and reporting obligations.

Mr. Sheehan holds dual citizenship in the U.S.A. and Ireland.


  • St. Louis University, J.D., cum laude, 1994
  • St. Louis University, M.B.A., 1988
  • St. Louis University, B.S.B.A. in Finance, cum laude, 1984


  • International Law Society
  • James S. McDonnell Scholar

Admissions & Affiliations

  • Illinois
  • Missouri
  • U.S. District Court for the Southern District of Illinois

Professional Associations

  • The Missouri Bar

Other Professional/Civic Involvement

  • Pro bono legal assistance, Madison County Legal Self-Help Center
  • Interviewer, St. Louis University Scholarship Committees
    • Presidential Scholarship
    • Dr. Martin Luther King, Jr. Scholarship
  • Society of St. Vincent De Paul (St. Louis, Missouri)
  • South County Toastmasters and Toastmasters International




Events & Speaking Engagements

  • “Ethical Considerations of Medicare Secondary Payer,” HarrisMartin Midwest Asbestos Litigation Conference (St. Louis MO, 2022). (Co-Presenter)
  • “Mental Health and Substance Abuse in the Legal Field,” HeplerBroom University, Edwardsville, Illinois (2020, 2018)
  • “Medicare Reporting and Reimbursement Obligations,” HeplerBroom University (Edwardsville IL, 2022, 2019).
  • “Settling the Asbestos Claim,” Asbestos and Mesothelioma Claims Litigation webinar, National Business Institute (2018). (Co-Presenter)
  • "Settlement Documents: Who Should Sign," HeplerBroom University, Edwardsville, Illinois (2017, 2015)

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  • "Medicare Reporting Under MMSEA§111: Why, Who, When, How, What," HeplerBroom University, Edwardsville, Illinois (2012)

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  • “Settlements Reached Before October 1, 2010 May be Reportable Under MMSEA §111 Requirements,” Midwest Toxic Release, Issue 24 (2010).
  • “Medicare Announces Streamlined Procedures for MMSEA §111 Reporting,” Midwest Toxic Release, Issue 23 (2010).
  • “Madison County Enters Medicare Reporting Order,” Midwest Toxic Release, Issue 21 (2010).
  • “Medicare Sues Defendants, Insurers and Plaintiff’s Attorneys for Reimbursement,” Midwest Toxic Release, Issue 18 (2010).
  • “Regulation of Transfrontier Shipment of Hazardous Waste,” St. Louis University International Law Monitor (1993)

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