Thomas Martin O'Connor

Thomas Martin O'Connor

O'Connor, Runckel & O'Malley, LLP
  • Personal Injury, Criminal Law, DUI & DWI
  • California
Claimed Lawyer ProfileSocial Media

Thomas M. O'Connor is a founding partner of the firm and currently focuses his practice on Criminal Defense and Personal Injury. As a partner in OâConnor, Runckel & O'Malley LLP, Mr. O'Connor regularly litigates personal injury and wrongful death actions and defends clients in all misdemeanor and felony matters.

Mr. O'Connor is a 5th generation San Francisco native and comes from a long line of distinguished attorneys. His grandfather and namesake, Thomas Martin O'Connor, held the office of City Attorney of San Francisco from 1961 until he retired in 1977. His great-grandfather, also Thomas Martin O'Connor, was a famous criminal lawyer in San Francisco, and his cousin, Thomas Lynch, held the office of District Attorney of San Francisco and was a three-term California State Attorney General.

Mr. O'Connor graduated from St. Ignatius High School in 1986. He attended St. Mary's College on a football scholarship and graduated in 1990 with degree in Political Science and a minor in Business Administration. In 1994, Mr. O'Connor graduated in the top of his class from the University of the Pacific, McGeorge School of Law.

From 1994 to 2006, Mr. O'Connor held a position as a Deputy District Attorney in the Contra Costa County District Attorney's Office. As a Deputy District Attorney, Mr. O'Connor prosecuted thousands of cases and tried over 100 jury trials ranging from DUIs to complex and lengthy special circumstance homicide cases. As a prosecutor for 12 years, Mr. O'Connor was assigned to several specialized units including Homicide, Domestic Violence, Serious Juvenile Offenders, Felony Filing, and Felony Crimes.

Mr. O'Connor also has extensive experience negotiating cases with other lawyers and judges. He has personally negotiated the disposition of thousands of cases. In addition, Mr. O'Connor has reviewed thousands of cases for the potential filing of criminal charges and understands firsthand the strengths and weaknesses of a case. These skills serve him and his clients as an invaluable asset in the investigation, litigation, and negotiation of all civil and criminal cases.

During his career, Mr. O'Connor has handled numerous high-profile murder cases and has extensive experience dealing with complex legal matters such as DNA (Deoxyribonucleic Acid); Ballistics; Thermal Imaging; Wiretaps; GPS (Global Positioning System) Tracking; and Psychological and Mental Defenses. In addition, Mr. OâConnor is extremely adept in dealing with public relations and the media involved in high-profile cases.

Following 12 years as prosecutor, Mr. O'Connor served as chief legal officer for a private corporation. During his tenure as chief legal officer, Mr. O'Connor handled a variety of legal practices, including regulatory, securities, litigation, new product and service development, commercial transactions, and general business litigation.

St Mary's Coll
Undergraduate Degree
Placeholder image for education.
McGeorge School of Law Univ of the Pacific
Law Degree
Placeholder image for education.
Professional Experience
O'Connor, Runckel & O'Malley, LLP
Deputy District Attorney
Contra Costa District Attorney's Office
Top Rated Personal Injury Attorney
Super Lawyers
Selected to Super Lawyers: 2013 - 2018
Multi-Million Dollar Advocates Forum
Professional Associations
California State Bar  # 172236
- Current
Placeholder image for professional associations.
Jurisdictions Admitted to Practice
Placeholder image for jurisdictions.
Practice Areas
Personal Injury
Animal & Dog Bites, Brain Injury, Car Accidents, Construction Accidents, Motorcycle Accidents, Premises Liability, Truck Accidents, Wrongful Death
Criminal Law
Criminal Appeals, Drug Crimes, Expungement, Fraud, Gun Crimes, Internet Crimes, Sex Crimes, Theft, Violent Crimes
Additional Practice Areas
  • Car Accidents
  • DMV Hearings / License Suspension
  • Drug Cases
  • General Civil
  • Murder & Manslaughter
  • Theft Crimes
Websites & Blogs
Law Blog
Contact & Map
O'Connor, Runckel & O'Malley, LLP
1196 Boulevard Way, Suite 20
Walnut Creek, CA 94595
Telephone: (925) 939-5600