Malissa Riehl is an associate with Thornton Law Firm LLP. She is a graduate of Truman State University (B.S. 2004), Webster University (M.B.A. 2005) and Suffolk University Law School (J.D. 2010). She is admitted to practice law in Massachusetts and Missouri.

Ms. Riehl joined the firm as a paralegal in 2007. During her time as a paralegal she provided support to several practice areas including pharmaceutical and medical devices, asbestos/mesothelioma and on individual personal injury cases. Notably, she assisted with two personal injury trials, one of which resulted in a jury verdict for the plaintiff in the amount of $2.9 million dollars.

Ms. Riehl now concentrates her practice in the firm’s drug and medical devices area as well as the Monsanto Roundup cases filed in St. Louis County, Missouri. She also handles mesothelioma and asbestos claims, Allergen breast implants, and Camp Lejeune cases. She was named a Best Lawyers “One to Watch” for 2024, in the areas of Mass Tort Litigation / Class Actions – Plaintiffs and Product Liability Litigation – Plaintiffs. She is a member of the American Association for Justice and the Massachusetts Bar Association.

  • Truman State University, B.S., 2004
  • Webster University, M.B.A., 2005
  • Suffolk University Law School, J.D., 2010
  • American Association for Justice
  • Massachusetts Bar Association
  • Named a “One to Watch” by Best Lawyers for 2024 in the areas of Mass Tort Litigation/Class Actions – Plaintiffs and Product Liability Litigation – Plaintiffs
  • Commonwealth of Massachusetts, 2010
  • State of Missouri, 2011


Thornton Law Firm was founded in 1978 by Michael Thornton and two other attorneys doing groundbreaking work for victims of mesothelioma and other asbestos-related diseases. Now a leading injury law firm in Massachusetts and one of the largest plaintiff law firms in New England, the firm has 19 attorneys representing thousands of clients in a wide variety of plaintiff-side work.

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