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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
28 Client Reviews
Showing 21 - 25 of 28 reviews
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...
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...
Posted by anonymous | April 17, 2025 | Hired Attorney
Exceptional Legal Service
I had the privilege of working with Attorney Jason Grosky, and I am incredibly grateful for the exceptional legal services he provided. From our very first consultation, Jason made me feel at ease, thoroughly explaining my legal options and walking me through each step of the process. His background ...
Posted by BM | April 16, 2025 | Hired Attorney | Lawsuits & Disputes
Highly Recommend
Jason was an incredible lawyer and resource during a difficult time. I knew I was in good hands from the moment we met. He helped walk through my situation and options in a clear and concise manner, and fought for what was best for me and my situation. He was extremely knowledgeable, professional, an...
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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