John G. O’Neill
About John G. O’Neill
John G. O’Neill is a lawyer based in Boston, MA and has been recognized in The Best Lawyers in America® since 2023. John G. O’Neill is recognized in the following practice areas:
- Boston, Massachusetts
- Insurance Law
- Litigation - Insurance
Current Firm: McAngus Goudelock & Courie LLC
Education: Boston College Law School, J.D., graduated 1995
Location: Boston, MA
Nearby Lawyers
Dana McSherry advises healthcare and life sciences companies in criminal and civil government enforcement matters and in related civil litigation, including civil False Claims Act litigation. She advises clients concerning all aspects of civil and criminal investigations relating to Medicare and Medicaid billing and other government contracting issues, including negotiating with the government and managing clients’ responses to civil investigative demands and large-scale investigative s...
Mr. Maycotte concentrates on family law and has practiced in the fields of international arbitration and litigation, business litigation, commercial litigation, and general civil litigation. He has extensive trial experience representing clients in a wide variety of family law matters. Mr. Maycotte currently serves as Co-Chair of the Family Law Section of the Boston Bar Association. He has earned his certification as a Certified Financial Litigator from the American Academy of Certified Finan...
Sarah Kitchell focuses her practice on transactional and regulatory matters affecting a wide range of clients in the health care industry, including nonprofit and for-profit health systems, academic medical centers, community hospitals, drug and device manufacturers, contract research organizations, and post-acute and sub-acute providers such as home health and hospice providers, therapy providers, behavioral health providers and senior living facilities. Read full biography: https://www.mwe....
Evelyn A. Haralampu is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Evelyn A., who practices law in Boston, Massachusetts, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Evelyn A. is held by other top lawyers in the same geographic and legal practice area.
Kurt Wm. Hemr is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Litigation - Securities. Kurt Wm., who practices law in Boston, Massachusetts, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kurt Wm. is held by other top lawyers in the same geographic and legal practice area.
Brian W. Cook is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Brian W., who practices law in Boston, Massachusetts, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Brian W. is held by other top lawyers in the same geographic and legal practice area.
Jeffrey M. Wolf is a member of the Firm's Corporate and Restructuring & Bankruptcy groups focusing his practice primarily on middle market financing transactions and restructuring matters, including the representation of commercial banks, other nonbank financial institutions, second lien and mezzanine lenders, funds and family offices in connection with all types of financing transactions, workouts and restructuring matters, as well as representing sponsor-backed and non-sponsor-backed bo...
Rory Pheiffer works with clients to develop patent portfolios, domestically and abroad, that align with their business goals. He also counsels clients on patent opinion and product clearance matters, IP due diligence issues on the buyer and seller side, license negotiations, and trademark portfolio growth and enforcement in conjunction with building the client’s brand. Clients rely on Rory’s technical knowledge, which he honed while earning a degree in mechanical engineering from ...
William E. Mone is a top attorney recognized by Best Lawyers in the practice area(s) of Leveraged Buyouts and Private Equity Law. William E., who practices law in Boston, Massachusetts, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William E. is held by other top lawyers in the same geographic and legal practice area.
Mary-Kathleen O'Connell is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Mary-Kathleen, who practices law in Boston, Massachusetts, has been recognized since 2005. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mary-Kathleen is held by other top lawyers in the same geographic and legal practice area.
Explore and Learn
2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States
by Jamilla Tabbara
The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.
Gun Rights for Convicted Felons? The DOJ Says It's Time.
by Bryan Driscoll
It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.
2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence
by Jamilla Tabbara
Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.
How to Sue for Defamation: Costs, Process and What to Expect
by Bryan Driscoll
Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
The Family Law Loophole That Lets Sex Offenders Parent Kids
by Bryan Driscoll
Is the state's surrogacy framework putting children at risk?
Holiday Pay Explained: Federal Rules and Employer Policies
by Bryan Driscoll
Understand how paid holidays work, when employers must follow their policies and when legal guidance may be necessary.
Unenforceable HOA Rules: What Homeowners Can Do About Illegal HOA Actions
by Bryan Driscoll
Not every HOA rule is legal. Learn how to recognize and fight unenforceable HOA rules that overstep the law.
How to Choose a Good Lawyer: Tips, Traits and Questions to Ask
by Laurie Villanueva
A Practical Guide for Your First-Time Hiring a Lawyer