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John B. Brennan
About John
Biography
I am a former prosecutor with over 32 years of Criminal Trial experience. Certified by the New Jersey Supreme Court as a Criminal Trial Attorney.
Practice Areas
3
Practice Areas
Fees and Rates
Cost
Payment Methods
- Cash
- Check
- Credit Card
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Chat withLicenses
Licensed in New Jersey for 36 years
State: New Jersey
Acquired: 1989
No misconduct found
Licensed in Pennsylvania for 36 years
State: Pennsylvania
Acquired: 1989
No misconduct found
Location
The Law Office of John B. Brennan
10000 Lincoln Dr, East, Suite 201, Marlton, NJ, 08053
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John B. Brennan's Reviews
Avvo Review Score
53 Client Reviews
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Practice Areas
Showing 1 - 5 of 21 reviews | Recommendation
Posted by Johanna | March 27, 2026 | Hired Attorney | Criminal Defense
Efficient and Effective Representation
Even though my case wasn’t a major one, Mr. Brennan handled it with professionalism and care. He was attentive, quick to respond, and made sure I understood everything along the way. Thanks to his efforts, my case was reduced to an ordinance violation. I’m very grateful for his support and would defi...
Posted by Yaron Daniel | December 14, 2022 | Hired Attorney | Criminal Defense
Amazing lawyer!
I got a letter in the mail that I was indited from a case a long time ago that I had no idea about! I was so scared that I was going to jail because of this! I did my research and came across Mr. Brennan. From the first phone call they were helpful and ready to meet with me to talk about what’s going...
Posted by DJ | July 09, 2021 | Hired Attorney | Lawsuits & Disputes
Professional
Mr. Brennan handled my difficult situation with extreme professionalism. It was a long hard battle that I could not have won by myself. I would recommend John Brennan to anyone needing an attorney. He’s one of the good guys!
Posted by Andrew | May 24, 2021 | Hired Attorney
Amazing Service
John took time before I even hired him to help me walk thru my issues and for this reason is why I haired him!!
Posted by anonymous | December 04, 2020 | Hired Attorney | Criminal Defense
A superb attorney !
Attorney John Brennan is honestly the BEST at what he does, plus he demonstrated to me that he is also a superb person. Mr. Brennan was essential in saving me from a very scary ordeal which I did not create. I was framed for assault by a person I thought was a friend. Unfortunately for me this pe...
John B. Brennan's Lawyer Endorsements
"I had the privilege of working with and learning from John Brennan at the Burlington County Prosecutor's Office. I have also handled various criminal defense matters with Mr. Brennan since he went into private practice. Simply stated, Mr. Brennan is a phenomenal criminal trial attorney. He is knowledgeable, talented and typically has more trial experience than the prosecutor's he goes up against. For those reasons, I hold Mr. Brennan in the highest regard and am happy to endorse him in the area of criminal defense."
"John is an excellent attorney who not only cares about his clients but has the tools knowledge and experience to help them. I have referred many cases to John over the years, because I know that he will give them his very best."
"I endorse this lawyer."
"I endorse this lawyer. John is one of the best. He is well respected. I highly recommend him."
"John and I were adversaries on many cases when he was at the prosecutor's office. He was a consummate professional who always treated me and my clients with respect."
"I endorse this lawyer."
"I had the pleasure of working for, and learning from, Mr. Brennan in the Burlington County Prosecutor's Office. He is one of the finest trial attorneys I have ever seen in my career and is thoroughly knowledgeable of all aspects of criminal law. He fights for his clients and obtains the best possible result. I endorse him without reservation."
"I endorse this lawyer."
"Mr. Brennan has a wealth of experience(over 25 years) in the area of criminal law. This has garnered him wide recognition in the court system-particularly here in Burlington County."
Stephen Bodnar
Criminal defense lawyer
Francis Masciocchi
Criminal defense lawyer
Robert Perry
Unknown lawyer
Robert Simons
Criminal defense lawyer
Paul Ferrell
Criminal defense lawyer
Experience
Honors
2018
Peer Review Rated, Martindale-Hubbell
2014
Certified Criminal Trial Attorney, New Jersey Supreme Court
Work Experience
2014 - Present
Owner, Law Office of John B. Brennan
1989 - 2014
Assistant Prosecutor, Burlington County Prosecutor's Office
Associations
2015 - Present
Burlington County Bar AssociationMember
New Jersey Association of Criminal Defense Lawyers
Education
1989
Widener University School of Law
JD - Juris Doctor
1989
College of New Jersey
BA - Bachelor of Arts
Languages
English
Activity
Legal Answers
Legal Guides
Legal Answers
Q&A
Can I get a restraining order on my father in law?
04 Apr 2025
Q&A
My case got transferred from municipal court to Prosecutor for reason being indictable ? What happens now?
18 Jan 2025
Q&A
How can I help my husband with a dv case?
13 Nov 2024