Fighting For Boston Families For More Than A Decade

Personal Injury 2022
Better Business Bureau Accreditation
Massachusetts Academy of Trial Attorneys
Medical Malpractice 2022
Massachusetts Bar Association
Best Lawyers
American Association for Justice
The National Trial Lawyers Top 40 Under 40

Our Team of Experienced Personal Injury Attorneys

At Sweeney Merrigan Personal Injury Lawyers, the attorneys at our Boston law firm provide top-notch, client-centric legal services that consistently achieve results and leave our clients satisfied. 

We have over 100 years of combined experience fighting for the rights and interests of the injured and are here to help you pursue the justice you deserve. Schedule a free consultation today by calling (617) 391-9001 or completing our contact form.

When choosing an attorney to represent your rights and interests, it is essential to consider their experience, recognitions, and areas of focus.

Our team includes the following trusted legal professionals.

Meet Our Partners

Tucker Merrigan, Boston personal injury attorney & co-manager of Sweeney Merrigan

J. Tucker Merrigan

Managing Partner

J. Tucker Merrigan, co-managing partner at Sweeney Merrigan Law, LLP, is a trusted leader in plaintiff’s litigation. With settlements exceeding $84 million, Tucker's unwavering integrity and advocacy have earned the firm widespread recognition. From representing over 125 Massachusetts cities and towns in the opioid crisis to his accolades as a Top 40 Under 40 Trial Attorney and Rising Star, Tucker's expertise is unmatched. With a background in Political Science from Tufts University and a law degree from New England School of Law, he blends academic prowess with real-world experience to champion his clients' rights.

Peter Merrigan

Managing Partner

Peter M. Merrigan, partner at Sweeney Merrigan Law, LLP, is a distinguished attorney recognized for his exceptional advocacy and impressive results. Named a Top 40 Under 40 Trial Attorney and Rising Star by Super Lawyers, Peter delivers outstanding outcomes for clients across motor vehicle accidents, personal injury, maritime accidents, and more. With a background in prosecuting for the Commonwealth of Massachusetts, Peter brings invaluable experience to his practice. Whether it's truck accidents or slip and fall incidents, Peter stands ready to champion his clients' rights with unwavering dedication. 

Thomas T. Merrigan


Thomas T. Merrigan, partner at Sweeney Merrigan Law, LLP, is a legal luminary with over four decades of experience. Renowned for securing landmark verdicts and recognized as one of Massachusetts' "Most Powerful" attorneys, he specializes in personal injury, medical malpractice, and criminal defense cases. Additionally, Tom is a trained mediator with certifications from top institutions, ensuring effective negotiation and facilitation.

Matthieu J. Parenteau


Matthieu Parenteau is a dedicated trial attorney committed to advocating for those injured by negligence. With a focus on catastrophic injury, motor vehicle collisions, and wrongful death cases, he has secured numerous resolutions for his clients, including multi-million-dollar settlements. Admitted to practice in both Massachusetts and Maine, Matthieu brings his expertise to state and federal courts. Outside the courtroom, he enjoys skiing, running, and surfing with his family and beloved labrador retriever. With a practice devoted entirely to litigation, Matthieu is a trusted advocate for his clients' rights.

Meet Our Personal Injury Attorneys

Ryan M. Hawkins

Senior Trial Attorney

Ryan Hawkins, senior trial attorney at Sweeney Merrigan Law, LLP, specializes in catastrophic injury, motor vehicle collisions, and diverse litigation areas. With extensive courtroom experience, Ryan has tried over 30 cases as a former Assistant District Attorney. He also served as a judicial law clerk at the Massachusetts Appeals Court and held key roles at the Massachusetts Department of Public Utilities. A graduate of New England Law | Boston, Ryan's commitment to justice is evident in his legal career and prior work as a legislative aide for the Massachusetts House of Representatives.

Erin E. McHugh

Trial Attorney

Erin McHugh, a respected Boston injury attorney at Sweeney Merrigan Law, focuses on personal injury cases, including motor vehicle accidents and medical malpractice. With notable successes, such as securing $4 million for medical malpractice victims, Erin's commitment to justice is evident. A graduate of Suffolk University Law School and Lafayette College, Erin's achievements include recognition as a Super Lawyers Rising Star. Active in professional associations like the Massachusetts Academy of Trial Attorneys, Erin is a trusted advocate for those seeking compensation in personal injury cases.

Kyle A. Camilleri

Trial Attorney

Kyle Camilleri is a dedicated trial attorney at Sweeney Merrigan Law, specializing in personal injury cases in Boston, including motor vehicle accidents and medical malpractice. With a strong academic background from Framingham State University and Suffolk University Law School, Kyle brings a unique perspective shaped by his service in the United States Marine Corps. Active in professional associations like the Massachusetts Academy of Trial Attorneys and the Boston Bar Association, Kyle is committed to serving his clients and the legal community.

Dylan T. Hixson

Trial Attorney

Dylan Hixson, a trial attorney at Sweeney Merrigan Law, applies his legal expertise to advocate for clients seeking restitution for injuries. A graduate of Boston University School of Law, Dylan brings valuable experience from his time at an insurance defense firm. He specializes in catastrophic personal injuries and motor vehicle accidents, serving clients with dedication and skill. Dylan is admitted to practice in Massachusetts and is an active member of the legal community, belonging to organizations like the Massachusetts Academy of Trial Attorneys and the Boston Bar Association.

Maggie K. O’Donnell

Trial Attorney

Maggie O’Donnell is a trial attorney at Sweeney Merrigan Law, specializing in personal injury cases in Boston, with a focus on motor vehicle accidents, premise liability, and dog bites. She graduated from New England School of Law after earning her Bachelor’s Degree from Fairfield University. Maggie's dedication to advocacy and legal excellence has earned her recognition in the 2024 National Trial Lawyers Top 40 Under 40.

Why Choose Our Boston Attorneys? 

The seasoned attorneys at Sweeney Merrigan Personal Injury Lawyers are tireless in their commitment to creating meaningful relationships and pursuing favorable outcomes for our clients. Some factors that set us apart include the following:

Decades of Combined Legal Experience

Our attorneys have over ten decades of legal experience. Members of our team have served as district justices, district attorneys, and civil attorneys, bringing their diverse knowledge and skills to their clients’ cases.

Since founding the firm in 2010, founding partners J. Tucker Merrigan and Peter M. Merrigan have focused on bringing together the most experienced attorneys together to provide their clients with an effective and personalized experience.

Recognized Legal Proficiency

Sweeney Merrigan Personal Injury Lawyers esteemed attorneys have been recognized by several outlets such as Forbes, Best Lawyers, Super Lawyers, and National Trial Lawyers for our commitment to achieving successful outcomes for our clients.

Our attorneys are active members of their local legal communities with memberships in the following organizations:

  • American Association for Justice
  • Massachusetts Academy of Trial Attorneys
  • Boston Bar Association
  • Massachusetts Bar Association
  • American Bar Association
  • American Association for Justice
  • Federal Bar Association
  • Women’s Bar Association of Massachusetts
  • Maine Bar Association
  • National Trial Lawyers Top 100

We understand the importance of continuing to strive for excellence in everything we do and have been repeatedly recognized for our efforts. 

Our Commitment to Excellence

At Sweeney Merrigan Personal Injury Lawyers, our attorneys are passionate about personal injury law and providing an unmatched experience to our clients. Some ways we demonstrate our commitment to excellence include the following:

Unwavering Support and Advocacy

Our clients are at the heart of our practice, and we take a personalized approach to every case. We understand that no personal injury accident impacts two victims the same way and will take the time to listen to your unique concerns. Our attorneys aim to be your pillar of support through every stage of the legal process. 

Proven Track Record of Success

The experienced attorneys at Sweeney Merrigan Personal Injury Lawyers are committed to creating a safer community for our clients and have an established history of recovering hundreds of millions of dollars for our clients in Boston and across Massachusetts.

A few of our most significant case results include multi-million dollar verdicts in municipal opioid recovery, medical malpractice, and motor vehicle accidents.

How Our Lawyers Handle Cases

  • What unique strategies do Sweeney Merrigan's lawyers employ in personal injury cases to maximize client settlements?

    Sweeney Merrigan Law is unique in the way it approaches our clients and their stories. We utilize a team-first approach, which maximizes our efficient advocacy. We borrow many strategies utilized in the tech industry, where we have frequent, short meetings, which result in a collaborative effort from many members of our team.

    Gone are the days of one lawyer sitting in an office full of paper. Instead, we take advantage of technology and a skilled team of talented attorneys, paralegals, and often law students who can accomplish significant work product in a short period of time.

  • How do the lawyers at Sweeney Merrigan tailor their legal approach based on the specific circumstances of each case?

    The strategy for any case in our firm can vary greatly. Some cases involve relatively small injuries or harm that can be resolved without a lawsuit. Others require extensive litigation that can go on for many years.

    When a truly catastrophic injury happens, we begin our representation by trying to discover why this happened and when or how this tragedy could have been prevented.

    We believe that our clients cannot achieve closure with the legal process until they fully understand why this harm occurred and how it can and will be prevented in the future.

    Until that occurs, there is no discussion of settlement or money. Only then, when those questions are answered, can we begin the process of closure and, ultimately, resolution.

  • Can Sweeney Merrigan's lawyers provide examples of complex cases they have successfully handled?

    Our firm has handled complex cases involving wrongful death, construction accidents, commercial vehicle crashes, dog bites, slip-and-falls, car crashes, sexual assaults, boating accidents, and fire events. 

  • What is the process for determining whether Sweeney Merrigan takes on a new personal injury case?

    When Sweeney Merrigan Law chooses to accept a new personal injury case, it is based upon whether the harm that occurred was preventable. From that perspective, we can not only advocate for our clients’ losses, but we can also create change to further community safety.

  • How do the lawyers at Sweeney Merrigan balance aggressive representation with compassionate client support?

    In all the cases we handle, we balance aggressive representation with compassion by focusing on the human story, the human loss. Representing plaintiffs allows us to focus on the people, not the insurance companies or corporations that are looking to profit. We take pride in what we do because the people who put their faith in us only get to go through this process once.

    Our clients place tremendous trust in us and, for that reason, we must execute not only a successful outcome but also a meaningful process – one that our clients can look back on and be proud of, despite the hardship of their circumstances.

  • What role do Sweeney Merrigan's lawyers play in the initial consultation and case evaluation process? 

    The lawyers approach the initial consultation or meeting from a relationship perspective. We regularly encourage clients to speak to many lawyers and choose the lawyer they, in their gut, feel they can trust.

    A personal injury case involves many important collaborative decisions between the attorney and the client. Without trust, the process will undoubtedly produce a frustrating and disappointing experience. Our attorneys make sure to begin the process of building a trusting relationship from the first meeting by being honest and sharing any initial concerns or issues we might see with the case.

    While our firm has achieved some record-setting success, we believe bragging about results with a perspective is a self-centered and dismissive approach to potential clients’ ongoing hardships. Instead, we focus on what we can do to best serve the client and put some of their immediate concerns at ease.

Ready to Discuss Your Case?

At Sweeney Merrigan Personal Injury Lawyers, we focus on delivering precise and effective legal representation with a personal touch that sets us apart.

Led by the experienced partnership of J. Tucker Merrigan and Peter M. Merrigan, our firm stands out in Boston for our commitment to each client’s unique case. We’re here to ensure that your rights are defended and your story is heard, all while guiding you through the legal process with clarity and support.

For your free consultation, please call us today at (617) 391-9001 or complete our contact form.