Tasks performed by emergency medical services (EMS) crew members are very diverse and vary widely from shift to shift. This research aims at presenting a comprehensive description of the workday of EMS crew members using a qualitative analysis of direct observation of a single workday to use as a baseline and a quantitative analysis of emergency dispatch data to investigate deviations from this baseline. The goals of this research are to provide a shared understanding of the experience of EMS crews over the course of a shift, and to identify opportunities to improve the work system of crewmembers using this information.