Karen joined the County Attorney’s Office in 2017. She represents the County in civil lawsuits, advises the Sheriff's Office and Risk Management, and represents various school districts in special education matters. 



Undergraduate: UC Berkeley

  • Phi Beta Kappa
  • Highest Distinction in General Scholarship
  • Dean’s Honors List

Law School: UC Berkeley

  • California Law Review
  • Moot Court Board


Prior Experience

Before joining the County Attorney’s Office, Karen was a shareholder with the law firm Greenberg Traurig, where her practice focused on complex commercial litigation and counseling in a variety of areas, including compliance, intellectual property, privacy, data security and data breaches. 

Karen Rosenthal headshot
Karen Rosenthal
Lead Deputy County Attorney
(650) 363-4693