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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
25 Client Reviews
Showing 1 - 4 of 4 reviews | Compassion
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 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 Jamie | May 30, 2025 | Hired Attorney | Elder Law
Best Experience
Jason took great care of my elderly dad. His communication was clear and understandable and he went above and beyond to see his case through, closing it out successfully and faster than we anticipated. As with any issue involving an attorney, the experience can be stressful and scary, but Jason const...
Posted by anonymous | May 19, 2025 | Hired Attorney | Lawsuits & Disputes
Simply the best!
Jason’s professionalism, expertise, and genuine care for his clients are truly unmatched. He assisted me with a personal matter and resolved the issue promptly and effectively. Throughout a challenging time marked by personal trauma, Jason made my safety his priority. He was always available to answe...
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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