You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. An incomplete application packet may disqualify an applicant.1 shall be included in the West Contra Costa. It presents different career opportunities that are available to you, important tips, various samples, and contact information. Far East Contra Costa County District employees can earn graduate-level professional development credits through UMass Global's Induction program. Candidates are required to complete the PSSA through thier candidate account for this position. Salary. Find out why the Contra Costa County Superior Court is your Employer of Choice! Below is a listing of all Contra Costa County's job classifications. The employee must have been employed full-time in the Contra.