To assist Contra Costa County in its commitment to Equal Employment Opportunity, applicants are asked to voluntarily provide the following information. An incomplete application packet may disqualify an applicant.You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. â–¡ Application to Contra Costa College via opencccapply.net. Many schools offer career-guidance tools. These tools can assist you in finding out how your interests and skills fit with careers and college. After you create an account, you will be automatically directed to complete the CCC International Student Application. I've committed to making a career shift and gaining experience in writing. Cover letter explaining your interest in the position. The PELLETB is a multiple-choice, fill-in-the-blank written examination designed to measure reading and writing ability.