Donna M. Diaz

Lead Deputy County Counsel

Donna M. Diaz joined the Office of the County Counsel in 1995 and is the lead attorney for the Workers’ Compensation section.  Her practice focuses on litigation and management of the County’s workers’ compensation claims, and she has successfully tried or resolved hundreds of workers’ compensation cases.  She also provides general advice on any matters that involve workers’ compensation issues, including employment matters, industrial disability retirement appeals and reasonable accommodation cases.  Finally, she works closely with the County’s public safety agencies to ensure that workers’ compensation, reasonable accommodation and temporary modified return to work issues are handled effectively and efficiently.  Under Donna’s leadership, the Office now handles virtually all of the County’s workers’ compensation claims in-house, and the section has grown from two to six full-time attorneys.

Recently, Donna assisted with the drafting of an amicus brief in County of Alameda v. WCAB (Knittel) (2013), which resulted in a favorable decision benefitting all public entities by establishing that safety officers are not entitled to one year of salary continuation benefits followed by two years of temporary disability benefits. 

Donna’s professional expertise includes:

  • Litigation before the Workers’ Compensation Appeals Board
  • Appellate litigation
  • Litigation of industrial disability retirement appeals


  • Howard University School of Law, J.D., 1983
  • College of Wooster, B.A.,1974

Prior Experience

  • Associate Attorney at Laughlin, Falbo, Levy and Moresi (1989-1995)
  • Associate Attorney at Mullen and Filippi (1988-1989)
  • Deputy City Attorney at City and County of San Francisco (1985-1988)
  • Staff Attorney at State Compensation Insurance Fund (1984-1985)

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