Executive Staff

Administration's primary mission is to prepare the department to successfully meet the challenges and opportunities that the 21st Century will bring to San Mateo County.

Sheriff Christina Corpus

Sheriff Christina Corpus has served the public and San Mateo County since 1995.
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Undersheriff Chris Hsiung

Chris is a long-time San Mateo County resident. He grew up in Foster City, graduated from Hillsdale High School in San Mateo, and has been an active part of the community since.
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Assistant Sheriff Ryan Monaghan

Ryan was born in Southern California and raised in San Mateo County. Ryan graduated from Serra High School in San Mateo. After graduation, he continued to study at University of Nevada, Reno.
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Executive Director of Administration / Chief of Staff Victor Aenlle

Victor Aenlle was born in Havana, Cuba. Victor immigrated to the United States at the age of eleven. He has been a San Mateo County resident for over 40 years. Throughout his 27 years in business, he used his strong negotiating skills to advance clients' interests, manage risk, and provide measurable results.
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