David Warren began his career in the Capitol as a staff member to California State Assembly Speaker Jesse Unruh in 1968.  From there David earned his law degree at New York University and was admitted to the State Bar in 1974, after which he went on to practice in criminal defense, civil rights, and other areas of law for 30 years before retiring and returning to Sacramento.

Prior to joining Capital Alliance, David was one of the original members of the Statewide Family Council, and one of the original advocates for Taxpayers for Improving Public Safety (TiPS).  He is a regular participant in both the Senate and Assembly Committees on Public Safety; the Senate Budget and Fiscal Review Subcommittee (4) on State Administration concerning prison issues; the California Rehabilitation Oversight Board (CROB); and special Senate hearings on such matters as prison health and integration of California's inmate population.

David is very active in the Jewish community, and is also a volunteer Jewish Chaplain.  In that role he has participated in the formulation of the California Department of Corrections and Rehabilitation's Kosher food program, and has visited 27 of the 34 state prisons, from Pelican Bay to R.J. Donovan.