Decision-making during major incidents has been described as inherently uncertain, requiring the coordination of multiple agencies. When an incident occurs, the overall control of the incident and subsequent resources is managed by the Strategic Coordination Group (SCG). This research drew on data from a simulated response to a Marauding Terrorist Firearms Attack (MTFA) at a local shopping centre. Three simulated SCG’S were video-recorded and Social Network analyses was conducted to explore communication during response. In addition, task flow diagrams were produced to represent how the teams managed the incidents and to highlight instances of good teamwork and areas of improvement.