Experienced Prosecutor.
Honest, Effective Leadership

For almost 20 years, Patrick Vanier has been a prosecutor in both the Contra Costa County District Attorney’s Office and today in the Santa Clara County District Attorney’s Office. He has successfully prosecuted hundreds of criminals. Today, prosecutors are not just trial attorneys. They are investigators, problem solvers, innovators, and community partners in combating crime. Patrick has proven to be a prosecutor with fresh ideas and a willingness to institute best practices to bring the criminal justice system into the 21st Century.


  • Supervising Deputy District Attorney for the Santa Clara County District Attorney’s Office Narcotics Prosecution Team
  • Former Deputy District Attorney at the Contra Costa County District Attorney’s Office
  • 2017 San Jose Police Department’s Excellence in Prosecution Awardee
  • 2015 California Narcotics Officers’ Association State Prosecutor of the Year Award
  • Prosecuted one of the largest seizures of methamphetamine in U.S. history; Prosecuted more than 50 jury trials; prosecuted thousands of felony cases
  • Area of expertise: wiretap investigations, collaborated with law enforcement on more than 100 wiretap applications involving murder, major narcotic and gang crime investigations
  • Reformed the prosecution of misdemeanor drug cases in Drug Treatment Court Departments to focus on prevention and awareness services for substance abusers
  • Collaborated in drafting of local ordinances and training of attorneys and law enforcement upon the legalization of marijuana
  • Prior to his work on the Narcotics Prosecution Team in Santa Clara County, he worked in the Sexual Assault Unit and the Burglary, Assault & Theft Team
  • Trains law enforcement and attorneys for the California District Attorneys’ Association, California Narcotics Officers’ Association, and the Northern California High Intensity Drug Trafficking Area
  • He, his wife Anaite and their three daughters live in San Ramon; grew up in Contra Costa County
  • Volunteer soccer coach for 12 years
  • Worked a variety of jobs -- including coaching and judging high school speech and debate, bookkeeper/assistant tax preparer and retail sales as he completed law school at night

Learn More About Patrick


* Endorsed by the Campbell Police Officers’ Association



Mr. Vanier enjoys an excellent reputation throughout the criminal justice system. He is a fair, pragmatic and progressive leader who listens to everyone, and brings people together to tackle difficult problems and make things better.

Jeffrey K. Rosen, Santa Clara County District Attorney