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Joseph Odysseus Mastro

Criminal defense Attorney at Berkeley, CA

5.0   11 reviews

also known as Joe Mastro

  • Licensed for 17 years
    State CA
    Acquired 2006
    Active No misconduct found

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

About Joseph

Learn Joseph’s areas of practice.

Practice areas
  1. Criminal defense
    Mr. Mastro works diligently and vigorously defending his clients, both in and out of court. Whether it's influencing a DA not to file charges after an arrest, obtaining a dismissal, negotiating an excellent deal, or getting a "not guilty" trial verdict, Joe represents his clients tirelessly, so they can focus on their lives.

    16 years, 2,000 cases

  2. DUI and DWI
    Mr. Mastro has extensive experience representing satisfied client after they've been arrested for DUIs. Whether the allegations involve alcohol or drugs, Joe works proactively and exhaustively to have evidence thrown out, cases dismissed, "not guilty" verdicts reached, and charges reduced.

    16 years, 200 cases

Mr. Mastro grew up around the Bay Area. He graduated from the Santa Clara University School of Law. He sat for and passed the California State Bar Examination on his first attempt.
Thereafter, Mr. Mastro became a Deputy Public Defender in San Joaquin County (Stockton, Tracy), representing indigent clients in all manner of criminal cases.
After opening his own criminal-defense law practice, Mr. Mastro partnered and teamed with Mr. Nino to bring clients as comprehensive and vigorous a representation as possible. After Mr. Nino retired, Joe moved forward with his new, innovative practice, Joe Mastro Law.
Mr. Mastro is a member of the Alameda County Bar Association Criminal Court Appointed Attorneys Program, through which he represents indigent clients in all of the criminal courts of Alameda County. He has represented thousands of clients, with exceedingly positive results.
He is licensed and insured to practice throughout California, as well as in the federal courts of the Northern District of California.
Mr. Mastro enjoys life enough to understand that it is his job to get his clients back to their lives as quickly as possible.

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Joe Mastro

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Joe Mastro Law
2625 Alcatraz Avenue
Suite 444
Berkeley, CA, 94705


5.0 / 5.0
  11 customer reviews
5 Star
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1 Star
Posted by Nick | March 11, 2023
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Help with my misdemeanor case
Initially I was very overwhelmed by my case and wasn’t sure how to proceed but Joe helped guide me step by step along the way. He is a also a very cool and funny guy. Would recommend to anyone.
Posted by anonymous | October 21, 2022
This review is from a person who hired this attorney.
| Hired Attorney
Great Lawyer and Person
Mr. Mastro helped me with my DUI case, and was able to get me a great result. Joe is very smart, kind, and always available when needed. I always knew he was working hard for me, and helped me figure out extra steps even when he did not have to. I would highly recommend Joe if you ever need this type of assistance.
Posted by anonymous | October 29, 2021
This review is from a person who hired this attorney.
| Hired Attorney
I would recommend Mr. Joseph Mastro Attorney-at-Law
My son got into some trouble before Covid hit and of course he had just turned 18, without Mr. Joseph Mastro Attorney-at-Law this could have been much worse. We called so many lawyers and no one would return our calls or they told us they were to busy. Mr. Mastro answered and spent about a half hour just talking to us, he did not ask for money to talk to us, just gave us some advice which he did not need to do without payment. Since no-one in my family has ever been in legal trouble before we were overwhelmed and wanted to be safe so we hired him on the spot, Mr. Mastro walked my son and us through the steps and was able to get the case dismissed. Luckily this was an eye opening event for my son and he has learned a lesson, something so small can have the potential to screw up the rest of your life. Thank you again Mr. Mastro for walking us through the process and helping get this case resolved, I hope we never have to use your services again but we will always keep your information for emergencies.
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Posted by Cherry | June 1, 2021
This review is from a person who hired this attorney.
| Hired Attorney
Pls. hire Joe Mastro to represent your DUI Case and you wont' be stressed or worried.
Let me provide a review to Atty. Joe Mastro. I was arrested of DUI back in Dec. 2019. I was so terrified, stressed and nervous. So I decided to hired a DUI lawyer which is Joe Mastro. Before I contacted Joe. I went to another lawyer that I got from website. I won't disclose the name. The lawyer want me to pay all the full cost up front. Then, I realized why should I pay him right away. I haven't received my verdict at the court and DMV decision of my hearings yet. The lawyer said pay him and he will call me if he needs some information from me. So, I saw Joe's name on my work's legal plan. Then I contacted him right away. I'm happy and surprised that he didn't ask me to put down-payment and up front cost. He said we will wait until we hear from the court and dmv. I was so relieved because I don't have money yet. He's not for money. He told me I will only pay him after the hearing at the court is done as well as the DMV. I was so relieved. Then he's very helpful and give me a good advise' I dumped all my worries to him. again, I was so worried, upset and don't know what to do. Then after the hearing, I have 3 options on my case and I took the 4 months suspension less money and less spending. I was very relieved and I don't have to worry. He's a very kind, honorable and decent lawyer. He's not up to your money. He asked for less monies on your case. Most of my friends that had DUI spent 7 to 10K. Like the other lawyer that I saw he want's me to pay right away. I'll would highly recommend Joe to be your DUI Atty. Joe is the best lawyer. Thanks Joe if not for you. I will be depressed, nervous. Thanks very much.
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Posted by Veronica M | June 15, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Criminal Defense/Driving violation
Mr. Mastro provided excellent customer service, always replied in a timely manner. Mr. Mastro was able to reduce all criminal charges to a simple traffic violation. I highly recommend Mr. Mastro.
Posted by Raquel | August 9, 2014
One of the best!
I was referred to Joe by a mutual acquaintance when my brother was arrested last month. My parents and I live on the other side of the country and were completely helpless. Joe went above and beyond to get us the information we needed, eased our mind by explaining the process and ensured we knew what was going on every step of the way. Charges were dropped, just as Joe thought they would be, and all was well! I would definitely recommend Joe to anyone looking for a great lawyer, he is definitely one of the best!
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Posted by Richard | July 9, 2014
The Best Attorney Ever in Law
I had a serious situation with my drivers license. And due to the fact that companies discriminate on your tiny little driving mistakes, they will not hire you if you have a suspension with in 1 or 3 years. Not many people know this. Until its to late! Joe was the best I have seen in my whole life. Most lawyers will take your money. He is honest and he gets the job done. Richard
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Posted by Santie | January 18, 2014
Mastro is reliable, attentive and knowledgable
Joesph Mastro is an excellent lawyer. He gave me a realistic perspective of what was going to take place and how to proceed. His expertise and knowledge were priceless. He answered all my questions and concerns in a kind and thoughtful manner. Mr. Mastro helped my family tremendously. He advocated for us, made critical phone calls in a timely manner, and communicated clearly. Basically, he navigated professionally through what was a wildly confusing and time consuming process. What could have been a disaster ended mildly. If you are in the same position as our family, I am sorry, but having Mr. Mastro advocating for you will be your saving grace. He is the comfort you need right now during this troubling time.
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Posted by Diane | January 13, 2014
The best one could ask for.....
Mr. Mastro was diligent, detailed and timely with the logistics of my son's arrest, charges and trial. He never let us down and went beyond the scope of any support I could have imagined. He provided an underpinning of knowledge and preparation that allowed me to help guide my son through this ordeal.
Posted by anonymous | January 6, 2014
Joe Mastro
Joe did excellent work on my case! He advised that the best case scenario was to have all charges dropped. In order to do this we had to move fast and get the DA to not file charges. I was not charged and everything was off my record. Thank you again Joe!
Posted by Mari | January 3, 2014
Highly Recommended!
Joseph Mastro is a very professional attorney who is trustworthy, responsive, very experienced and knowledgeable. Throughout the duration of my case I was consistently provided with clear concise direction that gave me a sense of ease. I highly recommend him.
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  • Free Consultation 45 minutes
Payment methods
Cash, Check, Credit Card


AVVO RATING 8.2 (Excellent)

Work Experience

  • Owner/Managing Attorney
  • Joe Mastro Law
  • 2009 - Present
  • Deputy Public Defender
  • San Joaquin County Public Defender's Office
  • 2007 - 2009


  • Santa Clara University School of Law
  • JD - Juris Doctor
  • 2006
  • Sonoma State University
  • BA - Bachelor of Arts
  • 2003

Legal Cases

  • People v. Jane Doe
  • ATTORNEY OUTCOME: Case continued 1 year and dismissed.
  • People v. Jane Doe
  • ATTORNEY OUTCOME: Client pleaded to a misdemeanor, but sentencing continued 1 year for case to be dismissed if client remained trouble-free; client withdrew plea after 1 year and case was dismissed.


  • Alameda County Bar Association, Criminal Court Appointed Attorneys Program
  • Member
  • 2009 - Present

Languages Spoken

  • English

Honors and Awards

  • Pro Bono Award
  • Katharine and George Alexander Community Law Center
  • N/A


  • It Gets Better: Coming Out, Overcoming Bullying, and Creating a Life Worth Living
  • A "Better" Evolution
  • 2011

Attorney endorsements

Received (7)
Given (11)
Endorse Joseph
Criminal defense Attorney | Sep 11
Relationship: Fellow lawyer in community
"I endorse this lawyer. It is very clear from many years of experience, contributions and reviews that Mr. Mastro is extremely knowledgeable and highly competent."
Criminal defense Attorney | Oct 21
Relationship: Fellow lawyer in community
"Joe was an exceptional public defender in San Joaquin County with thousands of cases to his credit. I personally saw the results that he achieved for an often ungrateful clientele. He genuinely cares for his clients and offers an impressive defense. Do yourself a favor and schedule a consultation with him first if you are in or near Oakland and need an aggressive defense."
Criminal defense Attorney | Jul 22
Relationship: Fellow lawyer in community
"Joseph Mastro is an attorney who cares about justice and fights for his client's rights. Mr. Mastro isn't afraid to zealously represent his clients, and certainly won't back down from aggressive prosecutors. I respect Mr. Mastro's work."
Criminal defense Attorney | May 28
Relationship: Fellow lawyer in community
"I endorse Joseph. He is a highly skilled attorney that is well respected in the legal community."
Criminal defense Attorney | Jan 27
Relationship: Worked together on matter
"I endorse this lawyer. He knows the law and he takes his job seriously. Because of his skills and experience, Mr. Mastro's clients are in excellent hands. Highly recommended."
Criminal defense Attorney | Jan 03
Relationship: Fellow lawyer in community
"Mr. Mastro is an aggressive yet compassionate attorney. He is very skilled in criminal defense, DUI law, and family law. He is a great litigator and trial attorney. His passion for his clients is demonstrated by his effective courtroom skills. I really do know Mr. Mastro. I have seen him in action. He should be on your list of attorneys if you are looking for one."
Criminal defense Attorney | Jan 03
Relationship: Co-worker
"Joe is an exceptional, vigilant attorney, who represents his clients with skill, professionalism, and success."
View more endorsements
Criminal defense
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Criminal defense
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Employment and labor
Criminal defense
Berkeley Criminal defense Lawyer Joseph Odysseus Mastro
Joseph Odysseus Mastro
Criminal defense Attorney
Berkeley, CA
Licensed for 17 years
Free Consultation