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Peter M. 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.

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Introduction

Attorney Peter M. Merrigan is a partner at Sweeney Merrigan Law, LLP. He joins his brother Attorney J. Tucker Merrigan and father Thomas T. Merrigan to form Sweeney Merrigan Law, LLP.

Named a 2015 through 2018 “Top 40 Under 40 Trial Attorney” and a 2015-2018 “Rising Star” according to Super Lawyers, Attorney Merrigan has a reputation for producing exceptional results on behalf of his clients by way of negotiation, mediation, arbitration, and trial.

He is admitted to practice in the Commonwealth of Massachusetts and focuses on Motor Vehicle Accidents, Personal Injury, Maritime accidents, Wrongful Death, Defective Products, Slip or Trip and Fall incidents, Insurance Disputes, and General Liability accidents.

Boston personal injury lawyer Peter Merrigan attended New England School of Law where he graduated Cum Laude. While in law school, Attorney Merrigan received the Cali Excellence for the Future Award for his excellent achievement in the study of Negotiation and Selected Topics in Constitutional Law.

Before graduating from New England School of Law, Attorney Merrigan successfully represented the Commonwealth of Massachusetts as a Rule 3:03 Prosecutor for Suffolk County at the West Roxbury District Court where he served as an Assistant District Attorney at arraignments, pre-trial conferences, motions, bench-trials, and jury trials.

He is currently a member of the Massachusetts Academy of Trial Attorneys, the Boston Bar Association, the Massachusetts Bar Association, and the National Lawyers Guild.

He also is a volunteer with Big Brothers Big Sisters of Greater Boston.

Attorney Peter Merrigan graduated from the Loomis Chaffee School before obtaining his Bachelors of Arts Degree from James Madison University in Virginia.

Areas of Practice in Boston, Massachusetts

Professional Associations and Memberships

  • Massachusetts Academy of Trial Attorneys
  • Boston Bar Association, Member
  • Massachusetts Bar Association, Member

Education

  • New England School of Law, Boston, Massachusetts
  • James Madison University, Virginia
  • Loomis Chaffee, Windsor Connecticut

Litigation Percentage

  • 100% of Practice Devoted to Litigation

Bar Admissions

  • Massachusetts
  • United States District Court, Massachusetts
  • Pennsylvania

HONORS & AWARDS

Peter Merrigan , of Sweeney Merrigan Law Firm, has been a great help to me at a time of need. His professional and very effective handling of my case is highly appreciated. Peter was assisted by a very able and helpful team of Staff members. With Peter and his Staff taking care of my case, I was able to rest and recover in peace while they handled every little detail , with hardly any need for me to do anything ! They brought the case to a satisfactory closure, and I am very happy with the outcome. This is a group I would recommend to anybody, without any reservations whatsoever. They are highly capable, decent, professional, empathetic, fair and completely trustworthy.
saswati datta

saswati datta

August 14, 2020

Peter Merrigan worked hard on my case. His work was careful, persistent and professional. The settlement was much more favorable than the initial insurance company offer. Legal assistant Larissa was patient and kind. I highly recommend.
mary king

mary king

August 28, 2018

Personal Injury Case – I can’t say enough about Peter Merrigan and how he handled my son’s case. He took an already stressful situation and talked us through it step by step for over a year. We spoke on a regular basis and he was always there to answer questions and give us updates. He was kind, calm, professional and throughout the whole process!
Robyn Quinn

Robyn Quinn

May 8, 2018

Peter Merrigan of Sweeney Merrigan Law handled my case very expertly. I was in a small Mazda 3 and was crashed into 3 times in succession by a Volvo ACL Dump Truck. There was a 3rd car involved as well. I was injured, scared, overwhelmed with phone calls, paperwork, and a lack of action on my behalf by the auto insurance companies. Peter and his paralegal team handled all the tough details, gave me good counsel, and stayed with me until the end, making sure that all the bills were paid. I received phenomenal therapeutic care for my back, and worked through my recovery. And thankfully, Peter also negotiated a very good settlement for the injuries I suffered. Definitely call Sweeney Merrigan to discuss what you’ve suffered, and hear how they can help you through it, and be compensated for your losses.
Elizabeth Macdonald

Elizabeth Macdonald

December 28, 2017

Getting injured in an accident is something that changes your life forever. It is an exhausting experience that requires a lot of paperwork and involvement. The best thing you can do is choose a great attorney that will help you throughout the process and fight for you till the end. Tucker and Peter Merrigan do just that. They go above and beyond for all of their clients. The dedication and commitment that they have makes them the best at what they do. I would recommend SML to all my family and friends because they are simply the best!!
Alda K

Alda K

June 29, 2016

To the Law Offices of Sweeney & Merrigan Attn: Mr. Peter Merrigan I’m writing today in appreciation for the work you accomplished on my behalf since my 2014 injury caused by an automobile accident. When my husband and I first visited you, I was in no shape to handle these affairs; you took that burden off me and advised that I concentrate on getting well and that was good advice! I am so used to bouncing back from any setback that I was surprised that my rehab was more grueling and took longer than I thought it would. All the while, you were fighting on my behalf, working things out, staying in touch and keeping me apprised of every step forward. Your attention and tenacity saw this case through to a fair settlement. I can’t say enough to thank you and your team for helping me through this difficult time. Many thanks, Valerie L.
Valerie Lee Larsen

Valerie Lee Larsen

February 26, 2016

Thanks to Peter Merrigan who took my case and got me a settlement that I thought I would never get and got me 10 times what I hope I would get. He is the most honest person I ever met. Some lawyers that I talked to talked down to me like I didn’t mean anything to them but not Pete he is a regular guy and treats you like you were his friend not just a client. Being disabled and having a accident in my wheelchair he really helped me out. I would highly recommend them for any legal matter. He doesn’t just take the easy case’s like most lawyers do he takes the hard cases and wins them.
Fran Reavey

Fran Reavey

March 1, 2015

Can’t rave enough about Peter Merrigan. What a phenomenal lawyer, person, and human being to have by your side through what would potentially be a very stressful and trying time. I suffered a number of large losses after being hit by a car a few years ago. Other lawyers (even those considered Boston’s best) either didn’t or couldn’t achieve what Peter achieved. Where others turned down the case thinking it was too much work or not worth it for them, Peter didn’t and we got everything we asked for from the insurance company. His high intelligence, good nature, calming demeanor, creativity and likability made what would be an awful process a pleasant one and I’m left with good memories from the process. He also uses language that you can relate to and understand, e.g. I am a kayaker and he would use river analogies to explain concepts :) Other lawyers/arbitrators can’t help but like him too (who wouldn’t?) and that is helpful during the entire legal process. You shouldn’t go anywhere else ..you don’t need to! So glad I found Peter and if I ever need legal assistance again ..I’m not going anywhere else. Thank you for helping to put this case to bed for me. This law firm IS one of Boston’s bests :)
Laurie Cestnick

Laurie Cestnick

August 28, 2014

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