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.
Showing 1 - 5 of 17 client reviews from Avvo
Posted by Ben | September 16, 2025 | Consulted Attorney
“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
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 anonymous | May 10, 2022 | Hired Attorney
It is difficult to put into words just how terrifying the potential for state prison is when facing your very first run-in with the law. I was lost, with absolutely no idea what to do. I hired a lawyer, who turned out to be a nightmare, and when I went to replace him, good fortune smiled on me when I...
Posted by Steven Smithson | January 17, 2022 | Hired Attorney
I hired Thomas mass out of all the lawyers in the Bay Area. I was looking for a lawyer I could trust my life with. I’ve hired lawyers before and got played out of my money with no positive results. Mr. mass took genuine care of my case and kept me updated through out the entire process. The charges w...
Posted by Carina | November 24, 2020 | Hired Attorney
Simply the best. I couldn’t have had a better attorney, he was thorough, and straight forward. And very confident in his job. I’d give him 10000 stars if I could
"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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