Effective immediately, the San Bernardino Police Traffic window is open for walk-up service. This policy manual is dedicated to the hard working professionals of the San Bernardino Police. Department.1. Candidates file an application online. 2. City staff reviews the application for minimum qualifications. 3. Inmate General Information. Inmate Visiting Guidelines. Recruitment Opportunities. In order to become a Rancho Cucamonga Police Officer, you need to apply and go through the San Bernardino County Sheriff's Academy. As an applicant for a position with the San Bernardino County Sheriff's Department, you are required to complete this background questionnaire. We hold ourselves accountable to the principles of the mission of the Bureau of Investigation.