Welcome to Mass Insurance Disputes

Mass Insurance Disputes is an educational resource provided by Massachusetts Attorney, Sean T. Carnathan of the law firm, O’Connor, Carnathan and Mack LLC. Massachusetts law and Massachusetts insurance companies are the focus of these articles and this site in general. This site provides general information only and is no substitute for consultation with a qualified attorney about any specific situation you may have.

Please call me at 781-359-9002 or email me with specific questions.


Best Lawyers Award Badge Irish Legal 100

Honors and Awards

  • Included in the 22nd & 23rd Edition of The Best Lawyers in America© for Litigation – Trusts and Estates
  • Martindale Hubbell Preeminent Rating
  • Massachusetts Super Lawyer
    • 2008 to date
  • Massachusetts Board of Bar Overseers Hearing Officer
  • FINRA Dispute Resolution Arbitrator
  • Fellow, Litigation Council of America


  • LL.M., Harvard Law School
  • J.D., summa cum laude, University of Maine School of Law
  • A.B., magna cum laude, Bowdoin College

Bar Admission

  • Massachusetts
  • Maine
  • New Hampshire