Research shows that police work is one of the most stressful professions in the world, and police officers typically suffer a variety of physiological, psychological, and behavioral effects and symptoms. Thus, constant exposure to stressful situations requires resilient police officers. Legislation, social support, organizational factors, and individual resources all play different roles in maintaining resilience among police officers. The aim of this chapter is to contribute to a multisystemic ecological theory of police resilience. By applying this analytical approach, the authors illustrate how systems on different levels interact with each other reciprocally. They conclude that resilience is necessary for officers to have the capacity to act authoritatively in uncertain situations. The use of multisystemic social-ecological theory provides a deeper understanding of the processes that contribute to positive development in professionally stressful contexts.