Positive psychology theory and research has expanded and matured rapidly over the past two decades and is now being used to effectively to design and evaluate interventions across a wide range of contexts and cultures (Donaldson, Dollwet, & Rao, 2015; Kim, Doiron, Warren, & Donaldson, 2018; Warren & Donaldson, 2017). This workshop is designed to provide participants with an opportunity to increase their understanding of evidence-based positive psychology theories and how they are being used to design and evaluate effective programs and interventions. Drawing on key primary studies, research syntheses, and meta-analyses of positive psychology interventions, participants will learn approaches for designing new interventions, and how to gather credible and actionable evidence to help improve the implementation of these interventions and to determine their effectiveness. A special emphasis will be placed on evaluating positive psychology interventions in diverse “real world” settings and across cultures. Practical examples will be provided to illustrate main points and key take-home messages, and to help participants to integrate these concepts into their own work immediately.