Corey T. Mastin Partner

Boston, MA

Phone: (617) 737-8869 Fax: (617) 342-4974 Download VCard

Corey T. Mastin

Corey is a partner in the Boston office of Morrison Mahoney. She concentrates her practice in the areas of tort and liability defense, as well as construction litigation. She represents insurance companies and their insureds in a range of civil litigation matters, including automobile, construction, products and premises liability suits, as well as defends insurers against allegations of bad faith claims handling practices.

Prior to joining Morrison Mahoney, Corey was an assistant district attorney and represented the Commonwealth of Massachusetts in over thirty bench and jury trials. Also as an assistant district attorney, she drafted and filed approximately fifty appellate briefs, as well as argued several dozen appeals before the Massachusetts Appeals Court and Supreme Judicial Court.

representative experience

  • Represented the Commonwealth of Massachusetts in affirming a first-degree murder conviction before the Massachusetts Supreme Judicial Court
  • Served as an Executive Editor for the Uniform Commercial Code Reporter-Digest at Boston College Law School


  • But It’s Not My Sidewalk – A Discussion of Premises Liability for Sidewalk-Adjacent Properties (The Standard, 2016)


  • Massachusetts Bar Association High School Mock Trial Judge
  • New Bedford Youth Court Judge 

Honors & Awards

  • Elected by her peers to the Best Lawyers: "Ones to Watch" Mass Tort Litigation / Class Actions - Defendants guide (2021-2022)

Boston, MA Office

250 Summer Street
Boston, MA 02210
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Areas of Practice

Bar Admissions

  • Massachusetts
  • Rhode Island
  • New York
  • United States District Court for the District of Massachusetts


  • B.A. — Northeastern University
  • J.D. — Boston College Law School

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