You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. Open examination -- Any persons qualified for the position may apply for the examination.The supplemental job information questionnaire should be prepared from the qualifications listed in the job announcement. Instructors needed for Computer Literacy courses that meet in the Fall and Spring semesters MTWTH pm- pm, for a 10-week period each semester. Hello, I applied to be an Experienced Clerk for the County. My first assigned interview is for the County Counsel. An incomplete application packet may disqualify an applicant. Welcome to Contra Costa County's on-line application process! No. You either accept it, or you don't. If it isnt' acceptable, you need to have a conversation with them about what can be changed.