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'.We can help you discover rewarding career paths, find a job, write your resume and cover letters and even get ready for interviews. An incomplete application packet may disqualify an applicant. Here are the steps for obtaining a work permit: Click on the application link below. Fill out your personal information at the top of the application. This document is the official Employment Application for Contra Costa County. It includes required personal, educational, and employment information. And submitting their application. A new work permit application must be filled out for each new job.