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William Boesch
Chair, Professional Liability Group
Chair, Intellectual Property Litigation Group

William L. Boesch


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William Boesch
Chair, Professional Liability Group
Chair, Intellectual Property Litigation Group
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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.

More about William

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  • Summary judgment win for insurer of professional home inspector in claim for unfairly failing to settle case brought by home buyer (more here)
  • Successful resolution of SEC ethics charges against accountant-auditor
  • Successful suit for preliminary and permanent injunction against website personally attacking lawyer, based on invasion-of-privacy theory, despite claim that lawyer was also a public official
  • Successful settlement of malpractice dispute between large law firm and university over unsuccessful suit against engineering firm
  • Successful settlement of malpractice dispute between accounting firm and entrepreneur client over alleged missed tax benefits
  • Summary judgment win for lawyers’ professional liability insurer in Delaware coverage and bad-faith dispute over claim seeking return of $215 million in contingent fees from securities class action (more here)
  • Summary judgment win for Boston accounting firm in malpractice suit brought by owner of group of restaurants, in case involving alleged errors in reporting of meals-tax receipts and non-filing of Form W-2’s, resulting in penalty proceedings
  • Successful resolution for liability insurer of suit alleging improper refusal to settle sexual-harassment case
    $1.13 million award in arbitration of fee dispute between tax consultants and defense contractor Raytheon (more here)
  • Summary judgment victory for client professional-liability insurer in two separate federal court cases, in New Hampshire and South Carolina, involving disputes over coverage for lawyers caught in check scams (more here )
  • Successful settlement on behalf of medical device inventors of patent-licensing dispute with major U.S. manufacturer
  • Successful settlement, on behalf of lawyer and law firm, of legal malpractice claim arising from $52 million commercial arbitration award in trademark-licensing dispute
  • Successful settlement on behalf of umbrella insurer of claim against primary carrier for mishandling defense of insured and failing to settle
  • Defense through jury trial and appeal of Fortune 500 technology company in trademark dispute with Massachusetts software maker
  • Jury verdict in favor of two patent lawyers in federal-court legal malpractice case arising from dispute over biotech patent, with judgment for law firm on counterclaim for unpaid fees
  • Jury verdict in favor of owners of international chain of Irish pubs in a trademark infringement dispute against hotel-industry giant, with judgment requiring opponent to cease using disputed mark. One of Massachusetts Lawyers Weekly’s “biggest defense wins” of the year
  • Jury verdict in favor of clients Sears, Roebuck and Co. and Emerson Electric Co. in long-running product-liability suit involving design of table saw. Win featured on front page of Massachusetts Lawyers Weekly and in Defense Research Institute newsletter The Voice
  • With Partner Regina E. Roman, acting as general outside coverage counsel for major professional liability insurer of lawyers, including work on revision of standard policy forms
  • Arbitration victory for tax accountant sued for malpractice by his former clients, prominent pair of authors and lecturers, who claimed he had failed to file tax returns and mishandled IRS audit
  • Pre-trial dismissal of defective-design product liability lawsuit brought by quadriplegic plaintiff against nationally known furniture manufacturer, based on much-litigated standards for admissibility of expert testimony. Massachusetts Lawyers Weekly named this one of “biggest defense wins” of year
  • Substantial settlement on behalf of family of HVAC worker who suffocated inside walk-in freezer where dry ice was being used to chill food while freezer was being repaired
  • Frequent work with clients and colleagues on decision-tree modeling of litigation risks and potential recoveries
  • Summary judgment in favor of large national retail client charged with violation of federal Computer Fraud and Abuse Act
  • Favorable resolution on behalf of inventor of dispute with medical-device company over alleged breach of disclosure agreement
  • Dismissal of suit against large international aluminum-can manufacturer alleged to have violated equipment lease
  • Jury verdict for bank’s general counsel accused in malpractice case of withholding information about pending loan application
  • Summary judgment for law firm charged with malpractice for improper drafting of release in tort case
  • Two terms as appointed hearing-committee officer on lawyer-discipline matters for Massachusetts Board of Bar Overseers
  • Successful jury-trial defense of liquid-propane valve manufacturer against product liability claims by tank-truck operator severely injured in explosion
  • Jury-trial win on behalf of ferry passenger who fell down flight of stairs and suffered debilitating knee injury
  • Disputes involving defective-design products claims addressed to stationary power woodworking tools, heating-system controls, large appliances, conveyor systems, construction cranes, and pneumatic tire-changing machines
Professional Affiliations
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  • Boston Bar Association (past co-chair, Professional Liability Committee)
  • Defense Research Institute (DRI) (Insurance Law and Professional Liability Committees)
  • American Bar Association Lawyers’ Professional Liability section
  • Professional Liability Underwriting Society (PLUS)
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  • Massachusetts Super Lawyers, Professional Liability Defense; Business Litigation
  • Best Lawyers in America, Legal Malpractice
  • Martindale-Hubbell, “AV-Preeminent” Rating
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William has two teenage sons and is a cyclist, runner, hiker, motorcyclist, and devout music fan. He lives in Beverly, Massachusetts, where he serves as a mayoral-appointed member of the Planning Board.