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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
27 Client Reviews
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Practice Areas
Showing 1 - 2 of 2 reviews | Family
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 Michael | January 19, 2026 | Hired Attorney | Family
Extremely professional
I cannot recommend this defense attorney highly enough. From the very beginning, Attorney Grosky handled an extremely sensitive case that involved family with professionalism, compassion, and discretion. Communication was outstanding — every step of the process was clearly explained, questions were a...
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