You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. It is important to submit your application with complete and accurate information.Processing time will vary depending on the type and size of the filing. The Court processes electronic filings from a.m. Contra Costa County is seeking talented and qualified individuals to fill clerical vacancies throughout the County! Information and links to various college resources for college employees including faculty, staff and management. Information and links to various college resources for college employees including faculty, staff and management. A cover letter of 300 words or less, explaining why you are the ideal candidate for the students at Contra Costa College. The PELLETB is a multiple-choice, fill-in-the-blank written examination designed to measure reading and writing ability.