The Personnel Security and Research Center (PERSEREC) conducted a comprehensive review of applicant compatibility assessments on behalf of DoD’s Office of the Under Secretary for Personnel and Readiness (OUSD P&R) Accession Policy Directorate, Sexual Assault Prevention and Response Office (SAPRO), and the Office of Force Resiliency (OFR). The goal of this review was to identify best practices for assessing and selecting DoD military applicants. Compatibility assessments are used to determine whether an applicant is likely to be a good “fit” for an organization and to estimate an applicant’s risk of engaging in future misconduct, violence, or other problematic behavior. These assessments may evaluate aspects of an applicant’s character, personality, values, opinions, decision-making, or behavioral and legal history.