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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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$0 first 30 minutes
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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
30 Client Reviews
Showing 6 - 10 of 12 reviews | Criminal Defense
Posted by Alfred | December 29, 2025 | Hired Attorney | Criminal Defense
Very committed and skilled attorney
Mr.Grosky represented me in a case in which I was looking at significant time. He did this pro bono. He was extremely professional in every way. When we first met to go over the case he was very thorough in collecting all my info. He did not rush at all and gave me the definite sense that he really c...
Posted by anonymous | October 20, 2025 | Hired Attorney | Criminal Defense
Exceptional Attorney
Jason Grosky is an exceptionally experienced, dedicated, and driven attorney. I came to Jason on a recommendation from a coworker who spoke just as highly of him as I now do. My case involved a driving incident with a Class A Misdemeanor charge, carrying the possibility of a large fine, potential ...
Posted by anonymous | October 05, 2025 | Hired Attorney | Criminal Defense
Excellent
Jason Grosky represented my daughter in a potential criminal case involving driving. From the time we first met with him, everything was explained in great detail, and in easy to understand language which put her at ease. She knew what to expect at every step. The end result turned out in the best po...
Posted by Connor | August 07, 2025 | Hired Attorney | Criminal Defense
Grosky is the best you can get. Seriously.
I hired Attorney Grosky to represent me on two Misdemeanor A theft charges in Salem District Court, and he exceeded my expectations in every way. Jason's communication was exceptional - always responsive, clear, and thorough. He explained my options and potential consequences in terms I could unders...
Posted by Mark | June 12, 2025 | Criminal Defense
Jason Grosky will Litteraly fight for your best outcome!
Let's start with the main point and that is flat out Jason Grosky is the best attorney I've ever met or had. I had a court date on April 16 of 2025. I had a schedule 1 possession charge hanging over my head. When I walked in to court on that morning I had no lawyer and no idea how much trouble I was...
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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