Bridging the science of sport and performance psychology with the operational realities of modern policing, this book equips practitioners to assist law enforcement agencies in fostering resilience, effectiveness, and safety in the line of duty. Drawing on the expertise of an international group of psychologists and professionals who work with law enforcement, this book discusses concepts and guidelines for implementing sport and performance psychology practices with law enforcement officers (LEOs). It presents practical frameworks for applying psychological skills in ways that align with the unique demands of policing and facilitates skill transfer from training to line-of-duty performance. The first section of the book reviews the historical and scientific foundations of the field of sport and performance psychology, delving into the high-performance mindset, and the cognitive and biopsychological factors that shape performance. The second section applies these concepts to police performance. This book examines police wellness, an emerging area in the psychology of policing. It also examines how performance psychology can be applied to patrol work, training, injury and critical incident stress management. A dedicated focus is given to the use of force and the perceptual and cognitive adaptations that occur under high-stress, high-stakes conditions. By combining evidence-based strategies with real-world application, this book supports the development of resilient, high-performing officers while enhancing psychological wellbeing across the profession. This work is a resource for psychologists, as well as police and other professionals whose work intersects with law enforcement, including police trainers, legal experts, and policy makers.