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Jason B Grosky
About Jason
Biography
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.
Practice Areas
Fees and Rates
Cost
Payment Methods
- Cash
- Check
- Credit Card
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Chat withLicenses
Licensed in New Hampshire for 16 years
State: New Hampshire
Acquired: 2009
No misconduct found
Licensed in Massachusetts for 19 years
State: Massachusetts
Acquired: 2006
No misconduct found
Location
Grosky Law Firm
105 Kenoza Ave, Haverhill, MA, 01830
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Jason B Grosky's Reviews
Avvo Review Score
28 Client Reviews
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Practice Areas
Showing 1 - 5 of 28 reviews
Posted by Lisa | April 21, 2026 | Hired Attorney
Very well supported
Jason Grosky comes highly recommended from me due to his outstanding responsiveness and commitment to explaining case details thoroughly. I felt well supported throughout the process. If you're seeking a knowledgeable lawyer with strong communication skills, Jason is the ideal choice.
Posted by anonymous | April 16, 2026 | Hired Attorney
Dilenia
Very professional and knowledgeable. With a confident and Calming presence.
Posted by Julie | April 10, 2026 | Family
Awesome
I recently hired Jason Grosky for representation with a restraining order extension. He answered all my questions, calls and texts right away!!! And more importantly, he got me a 5 year extension!!!! From the bottom of my heart…THANK YOU JASON!!!!
Posted by anonymous | April 06, 2026 | Hired Attorney
Honest, Responsive, and Patient Advocacy
I highly recommend Jason Grosky for anyone needing legal representation. Throughout my case, Jason was incredibly honest and direct about the process and potential outcomes, which gave me great peace of mind. He was quick to reply to all my questions and showed a high level of patience as we navigate...
Posted by anonymous | March 25, 2026 | Hired Attorney | Criminal Defense
Exceptional - Highly Recommend
He is truly the best of the best! He responded quickly, was incredibly knowledgeable, and didn’t hesitate to take immediate action when my hearing was expedited and we had only two days to prepare. He put my mind at ease while guiding me through one of the most stressful and frightening experiences o...
Jason B Grosky's Lawyer Endorsements
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Experience
Work Experience
2025 - Present
Principal, Grosky Law Firm
2009 - 2025
Prosecuting Attorney, Salem (NH) Police Department
2007 - 2009
Assistant District Attorney, Essex County District Attorneys Office
Education
2006
Massachusetts School of Law at Andover
JD - Juris Doctorate