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William L. Boesch

(617) 227-3030


  • J.D., Northeastern University School of Law, 1991
  • B.A., Dartmouth College, 1985
  • Phillips Exeter Academy, 1981

Practice Areas:


  • Massachusetts Super Lawyers (more)
  • Best Lawyers in America (more)
  • Rated "AV-Preeminent" by Martindale-Hubbell (more)

    Synopsis: William's trial practice includes representing accountants, lawyers and other professionals in malpractice cases, advising and representing insurers in coverage and bad-faith matters, and helping business clients with intellectual property and other commercial disputes. 

     William has practiced with Sugarman Rogers for 23 years. He joined the firm as an associate in 1992 following graduation from Northeastern Law School and a one-year term as a staff attorney with the United States Court of Appeals for the Second Circuit. He serves on SRBC's executive committee, and chairs its technology committee. 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. He lives on the North Shore of Massachusetts, and has served on the planning board, the finance committee, and the personnel board of his town. You can see William on Twitter and LinkedIn.


  • 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 and 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 (read the Case Report here)
  • 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 (read the Case Report, with link to the winning summary judgment brief on foreign trademarks and geographic-market priority, here)
  • 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 (more)
  • With SRBC partner Regina 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 (read the Case Report here)
  • 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 (read the case report here)
  • 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 (read Case Report here)
  • Jury-trial win on behalf of ferry passenger who fell down flight of stairs and suffered debilitating knee injury (read the Case Report here)
  • 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

Personal: William has two sons, a fourth- and a seventh-grader, and is a cyclist, runner, hiker, motorcyclist, and devout music fan.


  • 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)


  • Massachusetts (state and federal)
  • New Hampshire (state and federal)
  • Maine (state and federal)
  • U.S. Court of Appeals for the First Circuit
  • Pro Hac Vice Admissions in federal and/or state courts in Rhode Island, Connecticut, New York, Delaware, Virginia, South Carolina, Kansas

Related News:

October 24, 2016 -
Sugarman Rogers Makes the Massachusetts Supreme Judicial Court's "Pro Bono Honor Roll"
As we celebrate National Pro Bono Week and Massachusetts Pro Bono Month, we are pleased to announce that Sugarman Rogers has qualified for the Massachusetts Supreme Judicial Court's (SJC) 2015 "Pro Bono Honor Roll."

Learn more

October 21, 2016 -
Nineteen Sugarman Rogers Attorneys Recognized as "Super Lawyers" and "Rising Stars"

Nineteen lawyers from Sugarman Rogers have been included in this year’s edition of the Massachusetts "Super Lawyers" and "Rising Stars" lists. 
Sixteen attorneys have been named to the 2016 "Super Lawyers" list, an honor based on peer review and professional ...
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October 20, 2016 -
Victory for Tax Accountant in Family Business Dispute
Sugarman Rogers partner William L. Boesch and associate ...
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August 15, 2016 -
Twelve Sugarman Rogers Partners Named 2017 Best Lawyers in America
Sugarman Rogers is pleased to announce that twelve of its attorneys – over 70 percent of the firm’s partners – have been selected for inclusion in the 2017 edition of  ...
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June 15, 2016 -
Opportunity for Profit in Failed Children’s Book Development Deal May Bar Coverage, Appeals Court Says
Insurance coverage for company directors and officers is typically limited by an exclusion for cases in which the insured executive gained a personal profit. In a recent case, the Massachusetts Appeals Court held that this exclusion can apply and bar coverage even where the executive merely anticipates a ...
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April 01, 2016 -
SRBC Wins Dismissal of Claim Against Insurer
SRBC partner William L. Boesch and associate ...
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January 28, 2016 -
SRBC Supports “Walk to the Hill for Civil Legal Aid”
SRBC proudly supports the Equal Justice Coalition’s 17th Annual “Walk to the Hill for Civil Legal Aid” on January 28. The walk is one of the largest lobby days at the Massachusetts State House, with a goal to urge lawmakers to approve a budget of $27 million for programs that provide civil legal aid to ...
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November 06, 2015 -
SRBC Lawyers Recognized as Massachusetts Super Lawyers

Twenty lawyers from SRBC have been included in this year’s edition of Massachusetts Super Lawyers. Super Lawyers annually publishes the results of a peer-survey and independent-research study designed to identify leading lawyers by state. In this year’s listings, SRBC ...
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August 21, 2015 -
Thirteen SRBC Partners Named to The Best Lawyers in America 2016 List
Thirteen partners from the Boston-based civil litigation firm Sugarman, Rogers, Barshak & Cohen, P.C. received top rankings in the 2016 edition of The Best Lawyers in America® for their skills and expertise in their respective practice areas. 

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Related Publications:

April 04, 2013 -
Are In-Firm Communications About A Current Client Privileged?
In the Boston Bar Journal's Spring 2013 issue, SRBC partners David Barry and William Boesch look at an issue that is currently the subject of a case before ...
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January 2011 -
Massachusetts Legal Malpractice Cases 2000-2009
Massachusetts Law Review has published the latest in a leading series of articles by SRBC partners David Barry and William Boesch  surveying developments in Massachusetts legal malpractice law.

June 23, 2009 -
Do Legal Malpractice Claims Against IP Lawyers Belong in Federal Court?
In an article in Andrews's Professional Liability Litigation Reporter, SRBC's William Boesch writes about three recent federal appellate decisions addressing whether legal malpractice claims against intellectual property lawyers necessarily implicate matters of federal IP law, and therefore may be brought ...
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