You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. We can help you discover rewarding career paths, find a job, write your resume and cover letters and even get ready for interviews.Welcome to Contra Costa County's on-line application process! Should I got to Contra Costa College or Berkeley City College if I'm planning to transfer to a UC within 2 years? Find out why the Contra Costa County Superior Court is your Employer of Choice! It may take about 30 to 60 days depending. Apply online, test, and oral interview, job offer with start date. Upvote Up to a total of 16 units may be used as electives toward an A.A. or A.S. degree at Contra Costa College. Prior law enforcement jobs in CA are not required. Written Examination: Candidates that possess the minimum qualifications will advance in the recruitment process for Deputy Sheriff Recruit.