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City Manager



As a general law municipality, Clayton is organized by a Council-Manager form of government, where the City Manager functions as the chief executive officer of the City. Appointed by the City Council, the City Manager serves at the will and pleasure of the City Council and receives policy direction from the City Council during public meetings.

The City Manager is responsible for ensuring all laws and ordinances adopted by the City Council are properly implemented and enforced. Each Department Head of the City is hired by and supervised by the City Manager; together they form the team ultimately accountable for administering the day-to-day operations of the City’s services to its community.

City Manager

Bret Prebula


Executive Assistant to the City Manager/Human Resources Manager

Amy Walcker

The City Manager also oversees the position of Executive Assistant to the City Manager/Human Resources Manager; this position manages contract and franchise programs such as solid waste, household hazardous waste, cable television, and stormwater program; and coordinates special projects as assigned by the City Manager; and assists with development of the City’s goals and objectives amongst a variety of other duties.

Office of the City Manager Contact Information

  • Bret Prebula
    Bret Prebula City Manager

    Telephone:(925) 673-7300


  • Amy Walcker
    Amy Walcker Executive Assistant to the City Manager/HR Manager

    Telephone:(925) 673-7309