The process consists of the following steps: Create an Account. How to fill out the Contra Costa County Employment Application Form?1. Read the instructions carefully. 2. 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? An employee background check in California can return a variety of results, including criminal records, employment history, driving records, and more. All applicants to the Public Authority Registry will be required to undergo a Department of. A separate application is required for each position. To determine if a supplemental questionnaire is required, please check the job announcement. Contra Costa County only accepts online applications.