Atty. Thomas Michael Maas

Atty. Thomas Michael Maas

Thomas Maas has cultivated an impressive career in criminal defense, driven by his dedication and profound commitment to justice. Inspired by his father, William Maas, a renowned San Francisco defense attorney, Thomas was immersed in legal discourse from a young age.

Vallejo Vallejo 28 J. Erfahrung 28 year
Call (707) 515-0046 Book Appointment

Profile Summary

About Thomas Michael Maas at a glance

Thomas Michael Maas is a Managing Partner based in Vallejo, California, practicing at Maas and Russo. They have 28+ years of legal experience, licensed to practice since 1998. Their practice focuses on dui/dwi and criminal defense. Admitted to practice in California (1998). Educated at Golden Gate University (J.D., 1997) and University of Iowa (B.A., 1993). Recognitions include Peer Reviewed. Serands clients in Vallejo, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • Thomas Maas has cultivated an impressive career in criminal defense, driven by his dedication and profound commitment to justice
  • Inspired by his father, William Maas, a renowned San Francisco defense attorney, Thomas was immersed in legal discourse from a young age
  • Passing the Bar Exam in 1997, he embarked on his legal journey as a Public Defender in Solano County
  • There, he challenged conventions by taking misdemeanor cases to trial, achieving notable victories
  • In 2007, Thomas established Maas Law Offices, a family-run firm that allowed him to offer specialized services
  • His merger in 2019 with esteemed attorney Daniel Russo led to the formation of Maas & Russo, further broadening his impact in criminal defense
  • Known for defending clients against serious charges, Thomas has notably thwarted life sentences for hundreds through successful trials and negotiations
  • Thomas's practice emphasizes homicide defense and sexual assault cases, areas rife with potential for false accusations and overcharging
  • This requires strategic insight and a steadfast dedication to clients' rights
  • Thomas maintains strong relationships with clients and peers, emphasizing integrity and trust as cornerstones of effective representation

Practice Areas Explained

Thomas Michael Maas's Areas of Practice

Each practice area below reflects the types of cases Thomas Michael Maas handles, with a brief overview of what that area of law covers.

DUI / DWI Defense

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Thomas Michael Maas is one of 29,976 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in California →

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

Thomas Michael Maas is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in California →

Jurisdictional Context

Why local counsel matters in California

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Vallejo are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.

Looking for additional California attorneys? Browse all attorneys in Vallejo or all attorneys in California.

Frequently Asked

Common questions about Thomas Michael Maas

Where is Thomas Michael Maas's law office located?
Thomas Michael Maas's law practice is located in Vallejo, California. The firm is Maas and Russo. You can contact the office directly through this profile page.
What practice areas does Thomas Michael Maas handle?
Thomas Michael Maas focuses on dui/dwi, criminal defense. Each practice area listed reflects experience handling cases of that type in California.
How long has Thomas Michael Maas practiced law?
Thomas Michael Maas has 28+ years of legal experience and has been licensed since 1998.
Where did Thomas Michael Maas go to law school?
Thomas Michael Maas earned their education at (J.D., 1997); (B.A., 1993).
How can I contact Thomas Michael Maas for a consultation?
You can contact Thomas Michael Maas directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Thomas Michael Maas received?
Thomas Michael Maas's notable recognition includes: Peer Reviewed.

Education

J.D.
Golden Gate University
- 1997
B.A.
University of Iowa
- 1993

Awards

Peer Reviewed

Bar Admissions

California
Admitted: 1998

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