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Brett Corson

Partner I Attorney at Law

Brett Corson is a partner at Sweeney Merrigan Law, LLP, where he focuses on catastrophic injury and death cases, medical malpractice, and complex litigation. He is an experienced trial attorney for both plaintiffs and defendants, and a perennial Super Lawyers award winner. Brett is a graduate of the University of New Hampshire, cum laude, and Chapman University School of Law, where he was President of the Mock Trial Team. Prior to joining Sweeney Merrigan, Brett was a partner with an AmLaw200 law firm where he represented Fortune 100 companies, individuals, and professionals in high stakes litigation. Brett is a proud member of the United States Coast Guard, where he serves as a Reserve JAG Officer. He is an outdoorsman, father, husband, and annual participant in the Pan Mass Challenge.

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The Sweeney Merrigan Lawyers are so kind and friendly! The staff was so welcoming and accommodating to my family! They helped us so much!
Adrianna Davis

Adrianna Davis

August 20, 2025

I met the Sweeney Merrigan team at a local fair and they were very friendly and welcoming. They were handing out free backpacks and taking time to talk with people in the community. Really appreciate their generosity and support—it left me with a very positive impression of their firm.
Yuxin Tan

Yuxin Tan

August 20, 2025

Primarily working with Heather and Erin, the Sweeney Merrigan team stayed with me through a long and unique case. It was my first experience needing a legal team. Heather and Erin could always explain where we were in the process and what my options were along the way. I don’t want to get hurt again, but if I do, I know who I’m calling.
Berkley Stevens

Berkley Stevens

August 14, 2025

I give Sweeney Merrigan a five star rating they are awesome 👍 give their team a chance to get you what you deserve
Donald J. Santosuosso

Donald J. Santosuosso

August 12, 2025

Sweeney Merrigan Law—and especially our attorney, Erin—went above and beyond for our family during one of the most difficult times of our lives. Erin handled my daughter’s personal injury case with exceptional skill, care, and dedication. From the very beginning, Erin treated us like more than just clients—she listened, guided us every step of the way, and truly understood what our family was going through. Her professionalism and relentless commitment to achieving justice were evident in everything she did. Thanks to Erin and the entire Sweeney Merrigan team, we felt supported and protected throughout the entire process. She fought tirelessly for my daughter and secured a result that will have a lasting positive impact on her future. We are forever grateful for Erin’s compassion, expertise, and unwavering advocacy. I would highly recommend Erin and Sweeney Merrigan Law to anyone in need of a personal injury attorney who truly cares about their clients and delivers outstanding results.
Daniel Harris

Daniel Harris

August 5, 2025

I had an excellent experience with Sweeney Merrigan Lawyers. Ryan Hawkins was my personal attorney. He showed exceptional profesionalism and expertise when working with me. He was quick to answer the phone/email if i had any questions. He was very thorough with communication and guidance. I can’t thank him and his team enough. I would reccomend them to anyone.
Doug Poole

Doug Poole

June 24, 2025

I can’t say enough about Sweeney Merrigan law firm, from getting tossed aside by that other nation wide law firm Morgan and Morgan because my case wasn’t beneficial to their business is what they told me, Erin at Sweeney Merrigan achieved getting me the maximum amount of what I was insured for after a couple of texts and a couple of phone calls so easy,I know what firm is actually FOR THE PEOPLE I recommend highly Sweeney Merrigan they fight for their clients it’s obvious to me!
Rick Cameron

Rick Cameron

June 19, 2025

Awesome team over at Sweeney Merrigan!
Edward Astanin

Edward Astanin

May 15, 2025

Sweeney Merrigan is an amazing choice if you are looking for legal representation in the area. They are not scared of fighting on your behalf against any insurance companies, no matter how big they are. They do not back down, and fight for your rights to ensure you get the justice and compensation you deserve. Thank you guys, I recommend them 5/5.
Jennifer Thompson

Jennifer Thompson

April 15, 2025

Sweeney Merrigan and staff are AWESOME!!
Dave “Xyooj” Xiong

Dave “Xyooj” Xiong

April 14, 2025

I originally highered a top notch personal injury law Attorney for my personal injury case. After 8 months of holding my case Morgan and Morgan dropped me? I called Sweeney Merrigans office and I was taken in as a client immediately. Maggie was unbelievable and the constant contact reassuring me about every step. It didn’t take very long to settle the case (less then a year) and the turn around for payment. Please don’t hesitate to call Sweeney Merrigan for all questions and personal injury cases. You will be happy you did.
Sandy Stewart

Sandy Stewart

April 2, 2025

I wanted to take a moment to express my appreciation for the attorneys and team here at Sweeney Merrigan in Nashua. They understand the complexities and hardships that a personal injury brings on an individual, and it shows in all they do for their clients. If you really want a personal injury attorney that has the best in mind for you, then you have come to the right place.
Jazmine Green

Jazmine Green

March 17, 2025

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