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Gregory Grizopoulos

Criminal defense Attorney at Mineola, NY

4.6   10 reviews
Free consultation Virtual consultation available
Free consultation Virtual consultation available
  • Licensed for 21 years
    State NY
    Acquired 2003
    Due to Register within 30 Days of Birthday No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Gregory

Learn Gregory’s areas of practice.

Practice areas

Gregory Grizopoulos is a founding partner of Grizopoulos & Portz, P.C. He aggressively represents individuals who are arrested and charged with crimes and also represents those who are injured due to the negligence of others.

In August 2002, Gregory was appointed Assistant District Attorney by the Honorable Denis Dillon, District Attorney of Nassau County. He also received a special appointment to be Nassau County's Stop-DWI Special Prosecutor and was assigned the responsibility of prosecuting serious, high-profile, media sensitive Driving While Intoxicated (DWI) and related vehicular cases. He received training from police officers and national training in the areas of Alcohol Breath Testing and Highway Safety, Standarized Field Sobriety Tests (SFSTs) and Accident Reconstruction with the New York City Police Department's Accident Investigation Unit. He has also lectured at the Nassau County Police Academy about how to cross examine a police witness.

In addition to handling major felony cases, Gregory was assigned to the elite Vehicular Crimes Unit under D.A. Kathleen Rice where he handled felony DWI offenses involving serious injury.

Prior to joining the District Attorney's Office, Gregory worked as a law clerk at the prestigious criminal defense firm of Eoannou & Lana in the City of Buffalo, New York. There he assisted in both federal and state defense cases including the successful defense of country music stars Tim McGraw and Kenny Chesney.

In 2006, Gregory entered private practice specializing in the areas of personal injury, criminal defense and DWI-Vehicular crimes defense. Since that time Gregory has developed a reputation for excellence as a trial attorney and skilled advocate.

Gregory has been quoted by the media in his representation of clients in high profile cases including Fox 5 News, News 12 Long Island, Newsday, the New York Post and the New York Daily News. Gregory is a member in good standing of the Nassau County Bar Association, Former District Attorneys Association and the Nassau County Criminal Courts Bar Association. He is admitted to practice law in the State of New York and the United States District Courts of the Eastern and Southern Districts.

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Grizopoulos & Portz, P.C.
The Benchmark Building
170 Old Country Rd Ste 502
Mineola, NY, 11501


4.6 / 5.0
  10 customer reviews
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1 Star
Posted by Kirk | May 6, 2021
This review is from a person who hired this attorney.
| Hired Attorney
Great attorney
Greg Grizopoulos did a outstanding job handling my case he is very thorough and he is a outstanding attorney I highly recommend him
Posted by Keri-Anne | June 7, 2019
This review is from a person who hired this attorney.
| Hired Attorney
Great Lawyer and Person
Greg cares about the facts of the cases. As an activist the police in Nassau County have made a target of me. TWICE I have been the victim and had to fight TWO bad cases we won at one trial and now another is being dismissed. Greg handled my warrant when I missed a date while on the West Coast and has been fighting for me while out here I have not had to return. He always calls back and goes out of his way for his clients. Grizopolous & Portz puts a huge dent in the pathetic DAs conviction rate where they will carry on cases knowing the person is innocent. Pricing is very reasonable and well earned. I can't recommend Greg enough! A lawyer that actually listens and looks at the case with diligence.
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Posted by Gina | May 20, 2017
This review is from a person who hired this attorney.
| Hired Attorney
Charged with 2 felonies
I just wanted to take the time and speak on my experience with Greg Grizopoulos. I was extremely impressed by the way greg and his team handled my case (s). I have used greg in the past for a Aggrivated DWI, which of course got dismissed after a couple months. My most recent and definitely most severe case which included 2 felonies and a misdemeanor I knew without a doubt I needed Greg to represent me. From day 1 greg always kept me informed on what was going on, what I needed to do, and ALWAYS told me what was the best option for us to take. Anytime I called, Greg was always there! Weekdays, weekends, late in the evening, it didn't matter he always answered his phone, and if he didn't he always got back to me within the half hour. He definitely had me remain calm throughout the process. The outcome was more then expected, 2 felonies dropped to a violation--- can't beat that!! Anyways greg is a amazing lawyer and I highly recommend greg for any legal issues you might encounter. You are not just another client, he goes above and beyond for any legal issue big or small!
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Posted by kristine | May 5, 2017
This review is from a person who hired this attorney.
| Hired Attorney
DWI case - excellent attorney
I cannot express my gratitude to Greg and his wonderful team for his outstanding work and support on my case. My charge was a DWI and I honestly did not think I would see a good outcome. However, due to Mr. Grizopoulis who always showed up to every hearing prepared and confident my outcome was more than I hoped for. During my trial and watching him in the courtroom...he is truly an amazing lawyer. This is the attorney you want sitting beside you. I would highly recommend him.
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Posted by Fran | June 23, 2016
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
This from a juror ...
I was just on a jury where Greg Grizopoulos was the defense attorney, and I was so impressed with his skills and his presence in general, that I looked him up so I could write a reference. If I ever need a defense attorney, I would, without doubt, give him a shout.
Posted by anonymous | November 1, 2015
This review is from a person who hired this attorney.
| Hired Attorney
DUI case and business tickets
For my DUI case I shopped a few lawyers and felt comfortable with the experience, confidence, and price of the firm Grizopoulos works for. Him and his firm were able to work with the DA and come up with a creative solution that prevented a criminal offense from going on my record and just left me with a traffic violation. Subsequently I also used him for a couple small cases involving tickets to employees of my business. Overall I would feel comfortable using him again.
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Posted by Kerby | October 13, 2015
This review is from a person who hired this attorney.
| Hired Attorney
Criminal defense
Gregory grizopolos was a outstanding lawyer. I was wrongfully accused of 16 charges including reckless endangerment of a Nassau Police officer all because I lost my NYS drivers license & who ever found it handed it to the cops and fled the scene which led to chaos. The way he went about my case was strong an proved all the missing facts. Even tho my situation was sketchy to others he took the time to do his homework, listen & completely understand where the law went wrong on their behalf. One of the toughest cases he mentioned he ever had that actually got him nervous an for that I am VERY VERY greatful to have had him by my side 100%.
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Response from Gregory Grizopoulos October 21, 2015
It was my pleasure to represent you and help prove your innocence. Even when previous attorneys advised you to take a plea deal, you knew it was wrong to plead to a crime you didn't commit. I was nervous for you because I believed in your innocence but hard work and persistent investigation led us to a successful result. In the end, when the jury said 'Not Guilty' it was worth it all. Congratulations to you on fighting for your life back. I hope you inspire others to do the same.
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Posted by anonymous | August 9, 2015
Greg was amazing, he kept me informed on what was going on with my case and was on time to everything. He really put the truth out there for me. I would recommend Greg for any criminal defense service.
Posted by Michael | January 10, 2013
A blessing! So thankful!
I was so worried about my case but Greg kept me informed and always answered my calls. He even returned my calls in the evening hours and on weekends! In the end he was able to negotiate a plea with the DA to a non criminal conviction. I am so thankful that I was referred to Greg. I will definitely recommend him to anyone who needs help.
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Posted by anonymous | June 18, 2015
After sitting in court for five hours, this man lost my paper work. I waited a month and a half for this court date, and took off work that day.. Just for this man could make a fool out of me in front of the judge and loose my paper work. He did not care about the out come of my case clearly; I wouldn't recommend him even to my worst enemy.. Save your money and hire a real lawyer!
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Response from Gregory Grizopoulos June 28, 2015
I've never lost a client's paperwork ever (we maintain separate files for every single client) and I fight everyday for clients in and out of the courtroom. No one has ever been "made a fool out of" in front of the judge by me. Perhaps you have me confused with another attorney? If not, I encourage you to call my office to discuss your criminal case and talk about your court appearance. If you are truly a client (and not a desperate competitor lawyer) you know that I am available 24/7 and will call you back within minutes at any time of day.
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  • Free Consultation 60 minutes
  • Retainer Always
Payment methods
Cash, Check, Credit Card


AVVO RATING 9.1 (Superb)

Work Experience

  • Founding Partner
  • Grizopoulos & Portz
  • 2011 - Present
  • Attorney
  • DerGarabedian Dillon Grizopoulos & Nathan
  • 2006 - 2011
  • Assistant District Attorney
  • Nassau County District Attorney's Office
  • 2002 - 2006
  • Law Clerk
  • Manhattan District Attorney's Office
  • 2001 - 2001
View all work experience


  • State University of New York at Buffalo School of Law
  • JD - Juris Doctor
  • 2002
  • State University of New York, College at Geneseo
  • BA - Bachelor of Arts
  • 1999

Sample of Legal Cases

  • People vs D.C.
  • Acquitted of DWI - Reduced to lesser non-criminal violation
  • People v. Kristine C.
  • Acquitted of DWI
  • People v. Pablo D.
  • Acquitted
View all legal cases


  • Former Assistant District Attorney's Association of Nassau County
  • President
  • 2015 - Present
  • Hellenic Lawyers Association
  • Member
  • 2012 - Present
  • Criminal Courts Bar Association of Nassau County
  • Executive Board Member
  • 2011 - Present
  • Criminal Courts Bar Association of Nassau County
  • Member
  • 2006 - Present
  • Former Assistant District Attorney's Association of Nassau County
  • Member
  • 2006 - Present
  • Nassau County Bar Association
  • Member
  • 2003 - Present
  • American Bar Association
  • Member
  • 2011 - 2012
View all associations

Languages Spoken

  • English
  • Spanish

Honors and Awards

  • Who's Who
  • Who's Who Legal
  • 2017
  • Bench and Bar Award
  • New York State Fraternal Order of Court Officers
  • 2015
  • Excellence in Trial Advocacy
  • University at Buffalo Law School
  • 2001

Speaking Engagements

  • Meet the Candidates 2015 Moderator
  • 2015 Nassau County Candidates
  • 2015
  • FOX 5 News
  • Fatal DWI Trial and Crime Lab Shut Down
  • 2011
  • Nassau County Police Academy
  • Cross Examination of Police Witness
  • 2004

Attorney endorsements

Received (4)
Given (5)
Endorse Gregory
Criminal defense Attorney | Jul 28
Relationship: Fellow lawyer in community
"I have known Mr. Grizopoulos his entire career. I have always known him to be a strong advocate for his clients and a gentleman who is well known and respected in every court. He's also someone who doesn't hesitate to fight to the end on any case. I strongly endorse Gregory Grizopoulos and I am proud to call him a colleague and friend."
Criminal defense Attorney | Feb 12
Relationship: Fellow lawyer in community
"Gregory is an exceptional criminal defense attorney whose reputation speaks for itself. He is highly regarded in his field."
Criminal defense Attorney | Dec 29
Relationship: Fellow lawyer in community
"Greg is an outstanding attorney who will tackle any challenge to ensure that his clients achieve the best result possible. I fully endorse this lawyer."
Criminal defense Attorney | Jul 13
Relationship: Friend
"I endorse this lawyer."
Criminal defense
Criminal defense
Criminal defense
Personal injury