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Posted inLocal News

Chief Chestnut takes charge: New San Ramon police chief is first woman to hold the office

by Shaurya Chauhan, Contra Costa Youth Journalism December 31, 2025

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San Ramon Mayor Mark Armstrong swears in new Police Chief Becky Chestnut on Tuesday, Dec. 9, 2025. Chestnut, a 10-year veteran of the San Ramon Police Department, is the city's first woman police chief. (San Ramon Police Department via CCSpin)

THE SAN RAMON POLICE DEPARTMENT achieved a milestone earlier this month when it swore in the first woman to head the department. Capt. Becky Chestnut was sworn in on Dec. 9 and began serving as chief on Dec. 15.

Chestnut distinguished herself through a combination of operational leadership, investigative experience and administrative management, according to the cityโ€™s announcement of its decision. It added that her background aligns with the departmentโ€™s priorities around training, community and transparency.

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Chestnut succeeds former Chief Denton Carlson, who retired. Chestnut joined the San Ramon Police Department in 2015 after 13 years with the Contra Costa County Sheriffโ€™s Office. In San Ramon, she focused on building programs and improving internal operations. 

โ€œItโ€™s an honor to serve the San Ramon community and to lead the dedicated men and women of this police department,โ€ Chestnut said in the cityโ€™s announcement. โ€œI am committed to supporting our employees so they can continue providing exceptional service and maintaining the communityโ€™s trust.โ€ The department  includes 70 sworn officers and 20 civilian employees.

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โ€œI have worked with Chief Chestnut for just over 10 years,โ€ said San Ramon Police Lt. Mike Pistello, who noted that the two were promoted to corporal together in 2016. โ€œI have worked with her over the years as peers and as her subordinate.

โ€œChief Chestnut is easy to get along with and is very approachable,โ€ Pistello said. โ€œShe may not always agree, but she has always made me feel respected and that she appreciates what I and others have to say.โ€

Rising through the ranks

As a corporal beginning in 2016, she became involved in programs that placed her on the front line of public work, including the departmentโ€™s Community Academy, which educates residents on police procedures and public safety challenges through hands-on sessions and direct interaction with officers.

Chestnutโ€™s attention shifted to enhancing the departmentโ€™s workforce and training structure when she was promoted to sergeant in 2019. She assisted in recruiting over 30 officers, coordinated training and handled internal investigations.

Capt. Becky Chestnutโ€™s swearing in as San Ramon’s police chief took place at the San Ramon City Center. (San Ramon Police Department via CCSpin)

Two years later, she advanced to lieutenant, first serving as a watch commander for the patrol division. Later she oversaw the departmentโ€™s Youth Services and School Resource Officer (SRO) programs, which place trained officers in local schools and youth settings, where they provide support and early intervention. She also helped direct a behavioral health response program on how 911 calls involving mental health are handled by the San Ramon Police Department and the San Ramon Valley Fire Protection District. That project brings together police, fire and mental health professionals to improve responses to behavioral health crises. 

As police chief, Chestnut told city officials, she plans to focus on strengthening trust between officers and the community, and ensuring the department is prepared for changing public-safety demands.

Inspiring the future

Chestnut also identified training and development as top priorities for her first year. Chestnut said she intends to continue strengthening public safety, with partnerships with schools, agencies and health providers. She noted that San Ramonโ€™s existing programs provide a strong foundation for continued innovation.

โ€œI think itโ€™s great to have a female in such a powerful role,โ€ said Ashley Goldsmith, a California High School 12th grader who is interested in law enforcement. โ€œThere needs to be balance in leadership, and seeing women in these positions is inspiring.

โ€œI know sheโ€™s going to make a really big positive impact on our community, especially with her skills and all the different projects and organizations sheโ€™s involved with,โ€ Goldsmith said. โ€œI think sheโ€™ll make a really good fit.โ€


Shaurya Chauhan is an 11th grader at California High School in San Ramon, the News Lite editor and social media writer on the school paper,ย The Californian, and a CCYJ reporter.

This story originally appeared in CCSpin.

Tagged: appointment, behavioral health, CCSpin, CCYJ, Chief Becky Chestnut, Chief Denton Carlson, community policing, Contra Costa County, Contra Costa Youth Journalism, first responders, government, high school journalism, law enforcement, leadership, police, public safety, San Ramon, San Ramon Police Department, student journalism, women, women leaders, Youth Journalism, youth programs
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