You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. Contra Costa County only accepts online applications.When viewing a job posting for a currently open examination, you can select the option that says 'Apply'. To apply for graduation you need to apply online via the InSite Portal. Once your application is complete, click on Proceed to Certify and Submit. It's been 3 weeks and I haven't received an email or a phone call, nothing. Does anyone know how long on average the county takes to reach out to you? Should I got to Contra Costa College or Berkeley City College if I'm planning to transfer to a UC within 2 years? Each program has its own set of eligibility rules, and those rules can change from time to time. Tips for getting assistance quickly.