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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
34 Client Reviews
Showing 1 - 5 of 34 reviews
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...
Posted by Lindsey | July 30, 2026 | Hired Attorney
Wonderful experience !
I hired Jason to help with obtaining a restraining order for my son against another classmate after years of bullying with both physical and verbal issues. Jason was quick to respond to all my questions , extremely knowledgeable with how these orders worked and what was necessary for a successful ou...
Posted by anonymous | July 15, 2026 | Hired Attorney
Highly experienced attorney
Working with Jason was an experience that was seamless, painless, and top notch. He knows exactly what he's doing, and he knows when to do it as well. I would work with him again in a heartbeat.
Posted by Elizabeth | June 29, 2026 | Hired Attorney
Accessible, Results-Oriented, Calming
I hired Jason in May 2026 for an OUI arrest in Massachusetts. From our initial meeting through the court appearance, he made this very difficult process comfortable for me. He’s calming. He takes his time explaining the entire process to someone who has never been through this. I feel very fortunate ...
Posted by Tracy | May 29, 2026 | Hired Attorney
Your Go to Lawyer!
My husband and I had never needed a lawyer or been through the court system before, so we felt completely lost. Hiring Jason was one of the best decisions we made. He was incredibly responsive, patient, and always took the time to answer our many questions without ever making us feel like a burden. ...
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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