Proudly endorsed by:
All Superior Court Judges in San Mateo County
All District Attorneys in San Mateo County
About Brian
Born in Ireland, Brian and his family made San Mateo County their home in 1983. A graduate of Serra High School, Brian continued his education at the University of San Francisco, where he earned both his undergraduate and law degrees.
Inspired by his mother Margaret, a lifelong public servant whose career culminated as San Mateo’s Deputy City Treasurer, Brian has dedicated his own career to serving our community. For over 20 years, he has worked tirelessly as a San Mateo County Deputy District Attorney, protecting victims and seeking justice in the county.
Born in Ireland, Brian and his family made San Mateo County their home in 1983. A graduate of Serra High School, Brian continued his education at the University of San Francisco, where he earned both his undergraduate and law degrees.
Inspired by his mother Margaret, a lifelong public servant whose career culminated as San Mateo’s Deputy City Treasurer, Brian has dedicated his own career to serving our community. For over 20 years, he has worked tirelessly as a San Mateo County Deputy District Attorney, protecting victims and seeking justice in the county. Brian has successfully prosecuted some of San Mateo County’s most serious cases—including attempted murder, rape, kidnapping, domestic violence, and home invasion robbery—and has taken more than 50 jury trials to verdict in our county.
In addition to his distinguished legal career, Brian proudly served in the U.S. Army Reserve for 24 years, retiring in 2020 with the rank of Lieutenant Colonel. His exemplary service in Iraq earned him the Bronze Star.
Brian is deeply committed to our community, not only as a prosecutor and veteran but also as a husband and father. He and his wife, Susan, who also served nearly 18 years in public service at a Bay Area court, live in San Mateo County with their two children, both currently in high school.
With a lifelong commitment to justice, integrity, and public service, Brian is running for judge to ensure fairness, compassion, and safety throughout San Mateo County.
Read Less ▲Endorsements
Brian is honored to have received the following esteemed endorsements:
Rep. Kevin Mullin
Congressman, CA-15
Hon. Marc Berman
Assemblymember, District 23
Hon. Diane Papan
Assemblymember, District 21
Hon. Lisa Gauthier
Member, San Mateo County
Board of Supervisors
Hon. Ray Mueller
Member, San Mateo County
Board of Supervisors
Stephen Wagstaffe
District Attorney, San Mateo County
Julia Mates
Mayor, City of Belmont
Rico Medina
Mayor, City of San Bruno
Nicole Fernandez
Member, San Mateo City Council
Juslyn Manalo
Councilmember, Daly City
Hon. Stephanie Garratt
Superior Court Judge
Hon. Jonathan Karesh
Superior Court Judge (Ret)
Hon. Susan Irene Etezadi
Superior Court Judge
Hon. Elizabeth Hill
Superior Court Judge
Hon. Donald Ayoob
Superior Court Judge
Hon. Robert Foiles
Superior Court Judge (Ret)
Hon. Mark Forcum
Superior Court Judge (Ret)
Hon. Sean Dabel
Superior Court Judge
Hon. Kevin Dunleavy
Superior Court Judge
Hon. Michael Wendler
Superior Court Judge
Hon. Amarra Lee
Superior Court Judge
Hon. Elizabeth Lee
Superior Court Judge (Ret)
Hon. Sharon Cho
Superior Court Judge
Hon. Jeffrey Finigan
Superior Court Judge
Hon. Susan Greenberg
Superior Court Judge
Hon. Leland Davis
Superior Court Judge
Hon. Lisa Novak
Superior Court Judge
Hon. Rachel Holt
Superior Court Judge
Hon. Jeffrey Jackson
Superior Court Judge
Hon. Susan Jakubowski
Superior Court Judge
Hon. Rosendo Padilla
Superior Court Judge
Hon. Nancy Fineman
Superior Court Judge
Hon. Don R. Franchi
Superior Court Judge
Hon. Sarah P. Burdick
Superior Court Judge
Hon. John Runde
Superior Court Judge (Ret)
Hon. Michael Mau
Superior Court Judge
Hon. Nicole Healy
Superior Court Judge
Hon. Chinhayi Cadet
Superior Court Judge
Hon. Renee Reyna
Superior Court Judge
Hon. Vivian Wang
Superior Court Judge
Hon. Mark McCannon
Superior Court Judge
Hon. Raymond Swope
Superior Court Judge (Ret)
Hon. Stephen Hall
Superior Court Judge (Ret)
Hon. Gerald J. Buchwald
Superior Court Judge (Ret)
Hon. George Miram
Superior Court Judge (Ret)
Hon. John “Jack” Grandsaert
Superior Court Judge (Ret)
Hon. Marie Weiner
Superior Court Judge (Ret)
Hon. Margaret Kemp
Superior Court Judge (Ret)
San Mateo County
Shin-Mee Chang
Chief Deputy DA
Sean Gallagher
Chief Deputy DA (Ret)
Karen Guidotti
Chief Deputy DA (Ret)
Albert Serrato
Chief Deputy DA (Ret)
Rebecca Baum
Assistant DA
Morris Maya
Assistant DA
Joshua Stauffer
Assistant DA
Morley Pitt
Assistant DA (Ret)
Brian Abanto
Deputy DA
Negeen Abrishamcar
Deputy DA
Amanda Alcantara
Deputy DA
Gabriel Arredondo
Deputy DA
Victoria Bailey
Deputy DA
Allyson Bankhead
Deputy DA
Evelyn Barnes
Deputy DA
Brittany Benavides
Deputy DA
Tia Bentivegna
Deputy DA
Dave Bertini
Deputy DA
Sarah Boxer
Deputy DA
Francisco Brosas
Deputy DA
Cady Broxon
Deputy DA
Maggie Buitrago
Deputy DA
Finn Burke
Deputy DA
Kathryn Burke
Deputy DA
Delphine Burns
Deputy DA
Kyle Cakebread
Deputy DA
Brianna Callagy
Deputy DA
Joe Cannon
Deputy DA
Crystal Chau
Deputy DA
VJ Chetty
Deputy DA
Chris Chin
Deputy DA
Mary Louise Christiansen
Deputy DA
Dominique Davis
Deputy DA
Brian Donnellan
Deputy DA
Rebecca Dreyfuss
Deputy DA
Lucy Duran
Deputy DA
Sammy Duvvuri
Deputy DA
Heather Finlayson
Deputy DA
Aaron Fitzgerald
Deputy DA
Christine Ford
Deputy DA
Madeline Frank
Deputy DA
Ryan Geisser
Deputy DA
Preet Gill
Deputy DA
Nadia Hahn
Deputy DA
Vishal Jangla
Deputy DA
Emily Jeng
Deputy DA
Laura Keenan
Deputy DA
Young Kim
Deputy DA
Cammie Kimbrough
Deputy DA
Lucas King
Deputy DA
Sharron Lee
Deputy DA
Diego Lopez
Deputy DA
Peter Lynch
Deputy DA (Ret)
Joshua Martin
Deputy DA
Joel McComb
Deputy DA
Marie McLaughlin
Deputy DA
Ryan McLaughlin
Deputy DA
Ken Mifsud
Deputy DA
Molly Miram
Deputy DA
Nilou Mostarshed
Deputy DA
Ivan Nightengale
Deputy DA
Collette Ovanessian
Deputy DA
Kimberly Perrotti
Deputy DA
Tricia Povah
Deputy DA
Jay Rodacker
Deputy DA
Abby Rutherford
Deputy DA
Alpana Samant
Deputy DA
Nicole Sato
Deputy DA
Sun Seo
Deputy DA
David Stein
Deputy DA
Kara Szkotak
Deputy DA
Yasmin Tabi
Deputy DA
Elaine Tipton
Deputy DA (Ret)
Adrian Valenzuela
Deputy DA
Rachel Winer
Deputy DA
Kathy Wong
Deputy DA
Other Counties
Tina Nunes
Managing Deputy DA, San Francisco
Esther Aguayo
Carlos Alfonso
Emily Andrews
Josh Bentley
Linda Bramy
Ray Buenaventura
Paula Canny
Mark Camperi
Geoff Carr
Steven Chase
Joseph Cotchett
Jason Cueva
Brandon Douglass
Paul DeMeester
Todd Emmanuel
Ilya Frangos
Jai Gohel
Gary Goodman
Thomas Greenberg
Gabby Guraiib
John Halley
Jeffrey Hayden
Eric Hove
Mike Hroziencik
Charles Huang
Dean Johnson
Kirsten Keith
Jason Lamarc
Savas Loukedis
May Mar
Ronald Marblestone
Niall McCarthy
Melissa McKowan
Steven Schaiman
Charles J. Smith
Matthew Sullivan
Paul Wilkins
Burlingame Police
Officers’ Association
Colma Police
Officers’ Association
Daly City Police
Officers’ Association
East Palo Alto Police
Officers’ Association
Menlo Park Police
Officers’ Association
Menlo Park Police
Sergeants’ Association
Pacifica Police
Managers’ Association
Pacifica Police
Officers’ Association
San Bruno
Police Association
San Mateo Police
Sergeants’ Association
South San Francisco
Police Association
Elected Office
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Brian Donnellan for Judge 2026
℅ Ron Marblestone, Treasurer
PO BOX 103
REDWOOD CITY, CA 94063-0103
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