I don't really know what a Chief of Criminal Division actually does - but I'm thinking it sounds good on the resume:
District Attorney Kamala D. Harris has appointed Sharon Woo as the new Chief of Criminal Division at the San Francisco District Attorney’s Office.
She is the first Chinese American woman to hold this prestigious position in the City and County of San Francisco. Currently, Woo is the Managing Attorney of the Narcotics Unit. A graduate of the University of California at Los Angeles, she later received her Juris Doctorate from the University of San Francisco, School of Law.