Mark S Horrigan

Sole Practitioner
Lynn, Massachusetts
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Attorney Mark S. Horrigan, Seasoned, Versatile Trial Lawyer

He has over 30 years of active, in-depth litigation experience. During that time he defended business policyholders against personal injury and workers’ compensation claims. For six of those years he specialized in the defense of construction site injuries. Although his practice is now limited to representing plaintiffs, Mark’s experience with the insurer was invaluable. It thoroughly grounded him on how to effectively evaluate and resolve claims with insurers. Mark has tried a wide array of cases to a jury verdict. For instance, they have included fall down accidents, construction site accidents, auto accidents, medical malpractice, wrongful termination/defamation claims, negligent security, products liability, murder, armed robbery, drunk driving, etc. The number of cases Mark has tried to a jury verdict roughly places him in the top 3 percent of practicing Massachusetts lawyers in terms of the extent of his experience. Mark also has had very substantial workers’ compensation litigation experience. This has run the full gamut of workers’ compensation claims, including permanent and total disability, death, toxic exposure and heart attack claims. Attorney Horrigan continues to review and evaluate potential medical malpractice cases in collaboration with a loosely associated attorney, outside of the office with over 30 years of malpractice experience. Finally, he handles immigration matters, often on a collaborative basis with his wife and associate, Attorney Nancy B. Norman Horrigan, an immigration specialist.

Career Highlights — Mark S. Horrigan, ESQ.

$925,000 settlement in 2006 of Big Dig Construction Site Accident, $675,000 jury verdict in construction site personal injury case in October, 1998, subsequently settled for $725,000; won four permanent and total disability judgments on behalf of claimants at DIA; first-degree murder case tried to a conviction on 10/10/96 and subsequently vacated by agreement with the entry of a not guilty finding; conducted many direct and cross-examinations of physicians; approximately 75 jury trials to a verdict and over 75 bench trials to a judgment $450,000 jury verdict in Plymouth County in defamation case on behalf of former Massachusetts Highway Department employee against road construction contractor subsequently settled for $ 540,000; defense verdicts in approximately 85 percent of insurance defense trials; and a 1984, $150,000 defamation jury verdict against a university.

Areas Of Practice

  • 50 percent motor vehicle accidents
  • 15 percent workers’ compensation
  • 15 percent Social Security Disability
  • 10 percent construction site accidents
  • 10 percent miscellaneous litigation plus transactional divorce, criminal, wrongful termination, etc

Litigation Percentage

  • 95 percent of practice devoted to litigation

Bar Admissions

  • Massachusetts, 1982
  • U.S. District Court for the District of Massachusetts, 1983
  • U.S. Court of Appeals 1st Circuit, 1983


  • New England Law, Boston, Massachusetts
    • J.D. – 1982
  • Sulfolk University, Boston, Massachusetts
    • MPA – 1979

Professional Associations And Memberships

  • Massachusetts Bar Association, member, 1984 — Present

Past Employment Positions

  • Wausau Ins. Co., Law Office of William F. Caples, staff trial counsel, 1984 – 1995


  • Spanish