You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. All notices related to County recruitments for which you have applied will be sent via email.An incomplete application packet may disqualify an applicant. Click on the job title, and then Apply, to complete the application. You can use Remove if you want to delete an application without completing it. Hello, I applied to be an Experienced Clerk for the County. My first assigned interview is for the County Counsel. Should I got to Contra Costa College or Berkeley City College if I'm planning to transfer to a UC within 2 years? Many schools offer career-guidance tools. These tools can assist you in finding out how your interests and skills fit with careers and college.