William L. Boesch

William L. Boesch

Sugarman, Rogers, Barshak & Cohen, P.C.

Recognized since 2012

Boston, Massachusetts

Practice Areas

Insurance Law

Legal Malpractice Law - Defendants

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William has over 25 years of trial and appellate experience. He represents accountants, lawyers and other professionals in malpractice cases, advises insurers and litigates policy-coverage and bad-faith matters, and helps business clients with disputes about intellectual property and other complex commercial matters.

William’s excellence as a counselor and litigator comes from being genuinely attentive and accessible to his clients, from analytical and organizational skill, from lucidity, creativity and sensitivity as a legal writer and strategist, and from passion and clear-headed focus in the courtroom.

His recent successes include obtaining pretrial dismissal of several lawsuits against accountants and their firms by persuading the courts that the cases were legally meritless, helping national insurance companies find solutions to intricate and high-stakes coverage problems, resolving problematic legal malpractice cases through reasonable settlements, and scoring jury-trial victories in trademark-infringement and other complex and hard-fought civil disputes. He is a member of the bar in Massachusetts, New Hampshire and Maine, and appears frequently in state and federal court in those jurisdictions and elsewhere within and outside New England.

  • 101 Merrimac Street, Suite 900
    Boston, MA 02114
  • Northeastern University, J.D., graduated 1991
  • Dartmouth College, BA, graduated 1985
Bar Admissions
  • Massachusetts, Massachusetts Bar Association
  • New Hampshire, New Hampshire Bar Association
  • Maine, Maine State Bar Association
Federal Clerkships
  • United States Court of Appeals

Recognized in The Best Lawyers® in America 2023 for work in:
  • Insurance Law
  • Legal Malpractice Law - Defendants
Special Focus:
  • Intellectual Property
Additional Areas of Practice:
  • Arbitration
  • Commercial Litigation
  • Litigation - Insurance
  • Litigation - Intellectual Property
  • Mediation
  • Professional Malpractice Law
  • Professional Malpractice Law - Defendants


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