List experience that relates to the qualifications as required on the job announcement. 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'. Application for Employment. Mail the application to the individual indicated on the employment announcement. How to fill out the Contra Costa County Employment Application Form? 1. Read the instructions carefully. 2. The Contra Costa County Office of Education is now providing email notifications for upcoming employment opportunities with the CCCOE. This document is a job application form for positions between BPS 05 to 15 at Sukkur IBA. The Contra Costa County Office of the Sheriff is recruiting to fill Detention Services Worker vacancies.