Personnel Screening (PS-3) ensures that individuals with system access undergo appropriate background investigations before being granted authorization. For exam purposes, understand that PS-3 verifies identity, trustworthiness, and suitability in relation to assigned duties and system sensitivity. Screening level and frequency depend on position risk designation, regulatory requirements, and access to classified or sensitive data. The objective is to reduce insider threat potential and to establish accountability through documented vetting processes.

Operationally, PS-3 involves coordination between human resources, security offices, and system owners. Checks may include identity verification, criminal history, employment, education, and reference reviews, conducted under privacy and legal frameworks. Records of screening and adjudication decisions are retained securely and periodically updated for continuing access eligibility. Evidence includes completed screening forms, adjudication summaries, and access approval letters. Metrics such as percentage of staff with current screenings, average time to complete investigations, and exceptions under temporary approvals demonstrate control effectiveness. Pitfalls include incomplete documentation, inconsistent adjudication standards, or failure to revalidate screenings after role changes. Mastering PS-3 shows proficiency in managing personnel trust as a measurable control within the broader security ecosystem.
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