During incident response it is critical that responders communicate and update shared mental models. Mutual understandings and assumptions must be constantly updated to maintain effective coordination. This is known as Common Ground. It consists of all efforts required to manage coordination for the incident. This work is secondary to the incident itself: it is a necessary binding agent and catalyst to help effective teams build reciprocity and predict each other’s actions during mitigation activities. In this lightning talk we’ll cover how Common Ground is established, the responsibilities of Incident Command to maintain Common Grounding during incidents, and ultimately how Observability is a crucial piece of sustaining Common Ground.