David J. McMorris



Mr. McMorris is a trial lawyer and directs Thornton Law Firm’s health care subrogation and workplace injury practice. He is a member of the Massachusetts and New York bars and the American Association for Justice. Mr. McMorris’ trial experience has included several jury verdicts in excess of $1 million dollars in cases involving products liability, construction accidents, toxic exposures, lead paint poisoning, and asbestos exposure. Mr. McMorris was appointed by the federal district court to serve as plaintiff’s liaison counsel in asbestos litigation for the United States  District Court for the District of Massachusetts and has served in that position since 1993; he was  the plaintiff’s liaison counsel for the Massachusetts Superior Court’s  Massachusetts Asbestos Cases Consolidated Docket from 1993 -2017. He is a graduate of the State University of New York and of Suffolk University Law School.  He has been a guest lecturer on latent occupational disease and complex litigation at Tufts University and Boston University Law School.

Mr. McMorris has been named in Best Lawyers in America for many years, as well as a Massachusetts Super Lawyer for 15 years. He was named one of the Top 100 Trial Lawyers by the American Trial Lawyers Association, and one of the Top 100 Civil Trial Lawyers in Massachusetts by the National Trial Lawyers. The American Lawyer selected him as a 2019 Top Rated Lawyer in Mass Tort Law. He has been selected as one of New England's Top Rated Lawyers by ALM Media and Martindale-Hubbell™ for for many years. He is a member of Million Dollar Advocates Forum, has been awarded the highest 10 rating by the lawyer evaluation website avvo.com, and is rated “AV,” the highest available rating from Martindale-Hubbell, a highly respected independent legal rating publisher.

  • State University of New York (B.S. 1976)
  • Suffolk University (J.D., cum laude, 1983)


  • New York State Bar Association
  • Massachusetts Bar Association
  • American Association for Justice
  • 1983, Massachusetts
  • 1984, New York
  • 1984, U.S. District Court, District of Massachusetts
  • 1984, U.S. Court of Appeals, First Circuit
  • 1988, U.S. Supreme Court
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