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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.
Free Consultation
$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 16 - 20 of 28 reviews
Posted by James | September 17, 2025 | Hired Attorney
Outstanding Legal Representation and Results
I had an excellent experience working with Attorney Jason Grosky. He was professional, responsive, and clearly knowledgeable about every aspect of my case. His guidance made a stressful situation much easier, and the outcome exceeded my expectations. I highly recommend Attorney Grosky to anyone in n...
Posted by Austin | August 26, 2025 | Hired Attorney | Lawsuits & Disputes
Great guy, Great attorney!
Before meeting Jason Grosky I was an anxious mess. I got myself in a mess that I had no idea what to do. After just one consultation with Jason not only was my anxiety gone but I had a good idea of what was going to happen with my case. He explained everything to me in an easy manner and did not c...
Posted by Mitch | August 14, 2025 | Hired Attorney
Great Experience
Jason did a great job. He was a great communicator, understanding, and worked out a wonderful deal to make the process quick and easy. Would highly recommend!
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 Nick | July 11, 2025 | Hired Attorney
Great Lawyer
I had the pleasure of working with Jason Grosky, and I couldn't be more impressed with the level of service I received. From the start, he was incredibly accessible and always available to answer any questions I had. His efficiency in handling my case was remarkable—everything moved along smoothly, a...
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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