This article provides a rationale and guidelines for the adoption and implementation of positive behavior interventions and supports (PBIS) in secure juvenile justice settings, including benefits for youth and staff members. The rationale for extending PBIS to juvenile justice settings based on the authors' collective work in numerous states and types of juvenile settings is provided. The iterative development and field-testing process for PBIS implementation in these settings as well as features of the adapted materials and protocols are described. Evaluation methods are outlined and the paper closes with recommendations for future research and practice.