Emergency Medical Service (EMS) providers work in teams and their teamwork can affect patient safety and outcomes. Teamwork represents a mixture of collaborative behaviors that have been operationalized in different ways: describing types of communication, subjectively rating behaviors, assessing attitudes, and measuring shared situational awareness. Current methods attempt to distill the quality of teamwork into a single summative value, and consequently provide limited insight into the ongoing process of teamwork. The purpose of this dissertation was to develop a holistic and objective method to analyze the dynamics of EMS teamwork.