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A career prosecutor now fighting for you.
Representing clients before courts in Massachusetts and New Hampshire.
Jason B. Grosky, Esq. spent almost two decades as a courtroom prosecutor both in Massachusetts and New Hampshire. Each day, he's worked alongside police officers, assisting them on their cases, helping direct their investigations. He understands how a case is built from day one, the work of a detective, how officers think, their methods. He’s argued thousands of cases in front of judges and juries and earned a reputation as a hard-charging courtroom litigator. He's a fighter.
Now, he wants to fight for you.
If you’ve had an interaction with law enforcement and need legal counsel, give Attorney Grosky a call. The Grosky Law Firm focuses on criminal defense, impaired driving (DUI/OUI/DWI), motor vehicle infractions and administrative hearings, personal injury, juvenile law, divorce, family law and domestic relations including restraining orders stalking orders of protection and New Hampshire municipal law.
Proven experience.
Proven results.
Now on your side.
Fighting for you.
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Chat withState: New Hampshire
Acquired: 2009
No misconduct found
State: Massachusetts
Acquired: 2006
No misconduct found
105 Kenoza Ave, Haverhill, MA, 01830
38 Client Reviews
Showing 1 - 5 of 37 reviews | 5 stars
Posted by anonymous | October 16, 2026 | Hired Attorney
Recommendation of Jason Gorsky
Jason is knowledgeable, communicative and skilled at his craft. Having worked both on the prosecution and defense side of the law, he is able to propose solutions that are agreeable and in favor of his clients. He was able to facilitate a resolution to my case that I am very happy with.
Posted by Mike | October 09, 2026 | Hired Attorney
Attorney Grosky
I cannot say enough positive things about my experience working with Attorney Grosky. From the very beginning, he demonstrated exceptional professionalism, knowledge, and dedication to my case. Navigating a legal matter can be incredibly stressful, but having an attorney who is thorough, responsiv...
Posted by Davi | October 07, 2026 | Hired Attorney
The best lawyer ever
He's the best lawyer that I know, he answer fast, he'll always look for the best ways to help u.
Posted by Joseph | September 07, 2026 | Hired Attorney
5 Star Review
Jason was awesome during him representing me. The whole process was easy, smooth and ultimately the end result is what we were going for! I sure hope I don’t ever need his services again, but if I do, I wouldn’t ever consider hiring anybody else. Thank you Jason!
Posted by Michael | August 12, 2026 | Hired Attorney
Excellent Out-of-State DUI Lawyer
I can’t recommend this attorney highly enough. He represented me in an out-of-state DUI case and was incredibly responsive and supportive throughout the entire process. From our very first conversation, he made me feel like I wasn’t just another client — he treated me as if he were representing a mem...
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2025 - Present
Principal, Grosky Law Firm
2009 - 2025
Prosecuting Attorney, Salem (NH) Police Department
2007 - 2009
Assistant District Attorney, Essex County District Attorneys Office
2006
JD - Juris Doctorate