The Contra Costa Community College District first opened its doors in 1949. It is the eighth largest multi-college community college district in California. CCCCD serves a population of 948,816 people, and its boundaries encompass all but 48 of the 734 square mile land area of Contra Costa County. The College District includes: Contra Costa College, Diablo Valley College, Los Medanos College and the District Office. To apply for a job, click the Create Account. This enables you to:. Apply to new jobs.