Thomas Maas has emerged as a formidable figure in the criminal defense realm, with a career marked by dedication and a quest for justice. His legal passion was kindled early by his father, William Maas, a distinguished defense attorney. Thomas passed the Bar Exam in 1997, starting his career as a Solano County Public Defender, contrasting plea deal norms by triumphantly taking cases to trial.
In 2007, Thomas founded Maas Law Offices, a family-focused practice through which he offered personalized legal services. The 2019 merger with Daniel Russo to create Maas & Russo underscored his growth and commitment. Throughout his career, Thomas has successfully prevented life sentences for many clients, showcasing his legal ingenuity in handling serious charges through strategic trial victories and adept negotiations.
Thomas's diverse practice areas encompass homicide defense and sexual assault, fields susceptible to false claims and prosecutorial excesses. His work in these sensitive areas demonstrates a deep understanding of legal strategy and client advocacy. Thomas values integrity and strong client relationships, grounding his practice in trust and empathy. His career epitomizes a relentless dedication to justice and client-focused representation.
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Practice Areas
28 years | 750 cases
28 years | 25 cases
28 years | 35 cases
Sometimes
State: California
Acquired: 1998
No misconduct found
Other places you can find Thomas online.
17 Client Reviews
Showing 1 - 5 of 9 reviews | Advocacy
Posted by Ben | September 16, 2025
Highly recommend!
“I had an excellent experience working with Maas and Russo. From the very beginning, they were professional, responsive, and communicative. They always took the time to explain the process clearly and made sure I understood all of my options. What impressed me most was how dedicated they were — they ...
Posted by anonymous | March 19, 2025 | Hired Attorney | Criminal Defense
Simply the Best
Tom Maas doesn't just practice criminal law- it's his passion and calling in life. My case was extremely complex and Tom's command of the intricate details was amazing and unparalleled. Once my case commenced I had 100% of his time and attention. His court presence was commanding yet subtle and his l...
Posted by Mario | April 07, 2017 | Hired Attorney | DUI & DWI
Thank you Stacey!! And the mass team!!
I hire mass law office to handle my dui case out of Solano county this dui happened 4 years ago. I thought the district attorney never filed the case but i was wrong I had a warrant for my arrest I contacted mass law firm to handle my case and my lawyer Stacey Barrett was the one that took on my cas...
Posted by Alison | February 02, 2017 | Hired Attorney | DUI & DWI
Sharp, Diligent, Kind, Respected
Tom is very knowledgeable about DUI defense and diligent in reviewing and evaluating his client's case. He is strategic in navigating the court and the DMV from the beginning to achieve the best possible outcome for his client. He is also clearly respected by other officers of the court. When he sa...
Posted by Ricardo | January 31, 2017 | Hired Attorney | Criminal Defense
I highly recommend Mr, Maas
Mr. Maas is the best defense attorney in Solano County, He is fair, compassionate, and very smart. I was facing some serious time on some false accusations, I could possibly had spent the rest of my life behind bars but thankfully I hired Mr. Maas and because of his outstanding job I am freed today.
"Thomas Maas is a recognized expert in Criminal Defense. His knowledge of the law and skill in the courtroom are second to none. As one former client aptly put it, "he's the 800-pound gorilla in the room.""
Criminal defense lawyer
Criminal defense lawyer
Criminal defense lawyer
2015
Peer Review Rated, Martindale-Hubbell
2010
Rising Star, Super Lawyers
2009
Rising Star, SuperLawyers
1998 - 2007
Public Defender, Solano County Conflict Defender
1998 - 1998
Associate General Counsel, Law Offices of Louis Katz
Member
Attorney
2005 - 2008
California Attorneys for Criminal JusticeBoard of Directors
1997
JD - Juris Doctor
1993
BA - Bachelor of Arts
2007
Felony Sentencing
2006
Three Strikes Law
English
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