Executive Staff
San Mateo County Sheriff’s Office Organizational Chart
Sheriff Kenneth Binder
Sheriff Kenneth Binder, a law enforcement leader with nearly three decades of service, was sworn in as San Mateo County’s 27th Sheriff on Nov. 12, 2025. A career public servant, he is known for his leadership, integrity and commitment to organizational excellence.
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Undersheriff Chris Hsiung
Chris Hsiung serves as the Undersheriff of San Mateo County, bringing more than 30 years of public safety and executive leadership experience from throughout the Bay Area to the San Mateo County Sheriff’s Office.
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Assistant Sheriff Frank Dal Porto
Assistant Sheriff Frank Dal Porto’s homegrown and storied career with the San Mateo County Sheriff’s Office first began in 1998 as a young Correctional Officer. Through the years, he’s risen through the ranks, serving in nearly every facet of the Sheriff’s Office.
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Assistant Sheriff Ryan Monaghan
Assistant Sheriff Ryan Monaghan brings more than three decades of diverse public safety experience to the San Mateo County Sheriff’s Office. Returning to a role he previously held, he continues his long-standing commitment to serving San Mateo County with humility, integrity, professionalism and collaboration.
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Assistant Sheriff Mark Myers
Assistant Sheriff Mark Myers brings nearly 25 years of law enforcement experience and a long-standing commitment to the San Mateo County community.
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