It is the job of emergency management professionals to prepare health organizations for potential disasters and emergencies. Planning for pandemics and infectious disease hazards represents a  core emergency management activity. In light of the evolving COVID-19 pandemic and the pressures this places upon the healthcare system, it’s not yet clear how effective the response of healthcare organizations has been. Through a mixed-methods sequential explanatory design study, we aim to develop initial understanding of how emergency management professionals have contributed to the response of the ongoing crisis. Specifically, we aim to understand how prepared Canadian healthcare organizations were, what type of response they enacted, and what emergent practices were useful in response to the onset and over the first wave of the Covid-19 pandemic