David Twa is responsible for the overall administration of our county government and serves at the will of the Board of Supervisors. The County Administrator Officer (CAO) insures that our million plus Contra Costa residents receive taxpayer supported programs from A to Z (Airports to Zoning). Prior to his appointment as CAO in September 2008, David served as the County Manager for Ramsey County, Minnesota, the state's second largest county. David also served two terms as an elected county attorney. 

The County Administrator's Office is responsible for:

• Staffing the Board of Supervisors and Board committees
• Overseeing implementation of Board directives
• Planning, monitoring, and overseeing County operations
• Ensuring that Board policies are carried out in the most efficient, cost-effective, and service oriented manner
• Supervising appointed Department Heads and performing general administrative duties
• Preparing the annual budget
• Administering the County's labor management relations program, including managing the collective bargaining process, grievance investigations, providing training and counseling to managers and employees, as well as problem resolution