You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. List experience that relates to the qualifications as required on the job announcement.An incomplete application packet may disqualify an applicant. Should I got to Contra Costa College or Berkeley City College if I'm planning to transfer to a UC within 2 years? Provides routine information to students, faculty and other departments regarding registration and admission procedures and other general information. If you receive a renewal form in the mail, your county needs more information. Fill it out and return it right away to keep yourself and your family covered.