Free Consultation
$0 first 30 minutes
Jason A Seidman
About Jason
Biography
Jason A. Seidman spent five years as a prosecutor and attorney for the Middlesex County Prosecutor’s office, attaining a level of know-how that is invaluable to his criminal defense practice — and his clients — today.
“I know how prosecutors think,” he says. “That can be incredibly valuable now, in either trying to get a better plea offer or in trying to find a strategy to win at trial because you know that the prosecutor is thinking like a prosecutor and you can slip some defense attorney strategies in there that they never see coming.”
Mr. Seidman’s current practice focuses on criminal law with a strong emphasis on felony-level cases. He has achieved numerous positive outcomes for clients, including dismissal of a case where his client faced up to 10 years in prison involving a gun that the client didn’t know was in his bag and was detected by airport screening. Mr. Seidman has also been successful at having a number of his clients who were first-time offenders admitted to the state’s Pretrial Intervention Program.
During his time with the Middlesex County Prosecutor’s office, Mr. Seidman had some high-profile achievements. During the first 3½ years of his tenure there, he became a member of the trial team that handled street-level drug-distribution cases in New Brunswick. These cases ranged from possession with intent to distribute marijuana and cocaine all the way up to first-degree distribution and possession with the intent to distribute PCP. In addition to prosecuting drug cases, he also supervised the office’s Drug Court Unit, which aspires to help people beat their habits. He then moved to a trial team that handled all the crimes occurring in Woodbridge Township, Jamesburg, Milltown, Monroe, and Sayreville.
One of the highlights of his days as a prosecutor involved a cold case that was brought back to life by DNA evidence 30 years after the homicide of a 15-year-old prostitute. Mr. Seidman was part of the team that secured the conviction of the killer following a five-week trial that involved 30 witnesses.
Another highlight was his involvement in the investigation and prosecution of a 24-defendant racketeering case involving rival subsets of the Bloods street gang, the G-Shine Bloods and the Nine Trey Bloods, which were engaged in a turf war that resulted in the death of an innocent man killed by a stray bullet.
As that case matured, Mr. Seidman became the legal adviser to the Middlesex County Gangs, Guns and Drugs Task Force, a proactive investigative unit that assists the prosecutors. He spent his last 1½ years in the prosecutor’s office in that capacity.
A New Jersey native, Mr. Seidman comes from a family of lawyers. His mother and grandfather were both prosecutors, and his great-grandfather was a trusts and estates attorney. He received a B.A. in government and law from Lafayette College in 2005 and earned his J.D. from the University of the District of Columbia in 2009.
Asked what he likes most about his work, Mr. Seidman says he simply loves all aspects of litigation. “I like finding issues in cases. I like finding the one spot that nobody else sees and using that to my advantage. I like the competition, the back and forth, but I tend to do it in a subdued way. I’m not a very aggressive guy until I have to be.”
He considers his greatest strength as an attorney to be the level of preparation he invests in all his cases.
“I do not like to be surprised,” he says. “I do not like to lose.”
Practice Areas
2
Practice Areas
Criminal Defense
75%
15 years | 500 cases
DUI and DWI
25%
15 years | 250 cases
Fees and Rates
Cost
Retainer
Always
Payment Methods
- Cash
- Check
- Credit Card
Looking for an attorney? Avvo can help.
Search our directory
Quickly connect with top attorneys through our legal directory to get help with your legal issue.
Avvo's live chat agents can help coordinate a consultation with a local attorney.
Chat with a live agent who can match you with the right attorney for your legal needs.
Chat withLicenses
Licensed in New Jersey for 16 years
State: New Jersey
Acquired: 2009
No misconduct found
Location
Law Offices of Jonathan F. Marshall
53 Paterson Street, 1st Floor (by appointment only), New Brunswick, NJ, 08901
Gallery
Ad
Transform legal challenges into solutions.
Connect now to review your situation.
Jason A Seidman's Reviews
Showing 1 - 5 of 26 client reviews from Avvo
Posted by Legrand | October 7, 2025 | Consulted Attorney
This review is from a potential client who consulted with this attorney.
Holly recommended
Great law firm I called to ask a question and they save me from a probation violation
Posted by anonymous | April 27, 2023 | Hired Attorney
This review is from a person who hired this attorney.
The best attorney
I was represented by the best lawyer in NJ Mr.Seidman, he's not just an ordinary lawyer but smart and was able to resolve all issues and fought on my behalf to avoid jail time. No words could express our heartfelt gratitude and appreciation for the outcome of the case. God bless you and your team!
Posted by ——- | February 20, 2023 | Hired Attorney
This review is from a person who hired this attorney.
Great lawyer
MR Seidman is a very good lawyer I was fighting a gun charge out of Dunellen the gun was clearly mines and the gun was found my Dunellen Police the case was dismissed never reached grand jury case was dismissed after a month. Who ever stay that Jason is a mad lawyer you crazy he proved the evidence t...
Posted by anonymous | November 12, 2020 | Hired Attorney
This review is from a person who hired this attorney.
DOES'NT ADVOCATE FOR YOU
I must admit that the biggest action this attorney took was the money transfer. He sat with me and explained his Fee. Walked me through the whole transaction and just like that he won my checkings. Jason A Seidman done absolutely nothing. I never was able to contact Jason Seidman after I retained him...
Jason Seidman
Replied last December 2, 2020I would be very interested to know who actually posted this anonymous review, listing no identifiable facts pertaining to their case. This does not sound like any client interaction that I have had during my career. I advocate for every client I represent. Sounds to me like a competitor seeking to tarnish my good name.
Posted by Al | November 9, 2020 | Hired Attorney
This review is from a person who hired this attorney.
Best attorney
Let me start off by telling you Jason is not your typical lawyer liar. Jason is actually an attorney who cares. He puts effort in his work and also takes the time out to speak to you without saying you owe him $1000 for a phone call. I’ve dealt with a lot of attorneys in my life as far as getting ret...
Jason A Seidman's Lawyer Endorsements
"I endorse this lawyer. Jason is a zealous advocate for his clients, is a highly skilled attorney, and is a valuable asset to his law firm and to the practice of law."
"Jason is a great attorney. As a former prosecutor, he is prepared to represent his clients. He is knowledgeable and ready for any challenge. I endorse him 100 percent."
"I endorse this lawyer. Jason is very knowledgeable when it comes to criminal law, and is an attorney that commands respect. I would highly recommend Jason to anyone."
"I have known Jason for several years both as a defense attorney and prosecutor. I have always found him to be highly professional, knowledgeable, and effective. I would highly recommend him."
"I endorse this lawyer. Jason was a prosecutor in Middlesex County and I had several cases against him over the years. I was extremely impressed with his knowledge, skill and dedication. I knew this would translate well as a defense attorney and offered him a job."
"I endorse this lawyer. Jason is a former prosecutor and we worked together on cases which he prosecuted and I defended. In light of my experiences with Jason I know that he is smart and tough and does a great job for his clients like he did for the State."
"I have known Jason Seidman for several years. He was a tough, knowledgeable, and extremely skilled prosecutor. He knows the law and every person in the Court system and Prosecutor’s office. He knows all the police and detectives. He is a extremely skilled trial attorney and an expert on criminal law. I highly endorse Jason Seidman."
"I have known Jason for five years and worked on various matters with him during that time. He is knowledgeable, competent, and, when necessary, aggressive. I wholeheartedly endorse him as an attorney without hesitation or reservation."
"I endorse this lawyer. When I joined the firm, Mr. Seidman was welcoming in discussing our cases and potential arguments for our clients. Our discussions prove to me his experience and confidence in advocating vigorously on behalf of our clients."
"I have come across a multitude of attorneys in my time practicing the law. However, I would be hard-pressed to name a single one who is more intelligent, astute, and kind-hearted as Jason Seidman. He truly is a student-of-the-law. If Mr. Seidman is handling your matters, you can be assured that you are in competent and caring hands."
"I strongly endorse this attorney! This guy continues to impress me day in and day out with his hustle, dedication and knowledge of the law. Jay is the kind of guy who will never ask for a hand out - all of his accomplishments have been earned through shear determination and work ethic. He started his career as an intern at the Middlesex County Prosecutor's Office and soon gained the respect and recognition of the front office and he was hired as an Assistant Prosecutor. From there he quickly rose through the ranks to become the head of the drug task force. But what I find most impressive is how effectively he has transitioned into practicing criminal defense - something the vast majority of prosecutors are unable to do. Jay is one hell of a lawyer and an all around great guy and you would be lucky to have him represent you."
"I endorse this lawyer. Jason joined our firm six months ago after being a Middlesex County Prosecutor for five years. He has taken all his training and experience that he gained as a prosecutor and now uses it to vigorously advocate on his clients behalf."
Brett Rosen
Criminal defense lawyer
Michael Allongo
Criminal defense lawyer
Douglas Herring
Criminal defense lawyer
Leon Matchin
Criminal defense lawyer
Colin Bonus
DUI and DWI lawyer
William Fay
Criminal defense lawyer
Matthew Dorry
DUI and DWI lawyer
William Proetta
Criminal defense lawyer
Nicholas Moschella
Criminal defense lawyer
Keith Oliver
Criminal defense lawyer
Experience
Honors
2013
Certificate of Completion Drug Court Conference and Training, Administrative Office of the Courts
2013
Certificate of Completion Top Gun Narcotics Training, New Jersey Division of Criminal Justice
2011
Certificate of Completion- The Art and Skill of Trial Advocacay, Attorney General's Advocacy Institute
Work Experience
2018 - Present
Managing Attorney, Law Offices of Jonathan F. Marshall
2015 - 2018
Attorney, The Law Offices of Jonathan F. Marshall
2010 - 2015
Assistant Prosecutor/Attorney, Middlesex County Prosecutor's Office, New Brunswick, New Jersey
2009 - 2010
Managing Attorney, Law Office of Jason A. Seidman
2008 - 2008
Summer Associate, Central Jersey Legal Services
2007 - 2007
Summer Associate, Arseneault, Whipple, Farmer, Fasset, & Azzarello
Associations
2013 - Present
Middlesex County Bar AssociationMember
2011 - 2015
Middlesex County Prosecutor's AssociationMember
Sample of Legal Cases
I.M.R. v. A.R.S.
The decision of the Family Part was reversed and the Final Restraining Order was vacated.
State v. VK
All Charges Dismissed
State v. BC
Not guilty verdict.
State v. SJ
Dismissed
State v. CV
Dismissed
IMO THE APPLICATION OF M.G. FOR THE EXPUNGEMENT OF RECORDS
Adversaries appeal denied
IMO RC
Case Dismissed after trial
Education
2009
University of the District of Columbia, David A. Clarke School of Law
JD - Juris Doctor
2005
Lafayette College
BA - Bachelor of Arts
Speaking Engagements
2019
Pre-Indictment Process in Middlesex County
Pre-Indictment Process
2015
Expunging a Criminal Record - what you need to know as a defense attorney; what you need to know as a prosecutor
Expungement
2014
Grand Jury Practice
Grand Jury
2013
Recent Developments in Expungement Law
Expungements
Publications
2015
AVVO Legal Guides
Guide to the New Jersey Criminal Process (Pre bail reform)
Languages
English
Spanish
Activity
Legal Answers
Legal Guides
Legal Answers
Q&A
Is it illegal to have a relationship with a 16 year old when I am 19?
11 Aug 2020
Q&A
Am I done with conditional discharge?
28 Jul 2020
Q&A
Is accepting a plea offer (pleading guilty) treated the same as a conviction for expungement purposes?
31 Jul 2020