This Department of Social Work Services (the Department) is one of the largest hospital social work departments in the country, with almost 600 staff, in the largest of eight hospitals and one medical school of a major health system. The Department's senior directors (three current and one former) share its innovative and effective collective leadership model that was initially developed in response to a confluence of unprecedented complex events stemming from the Covid-19 pandemic. The experiences of these co-leaders, an evaluation of the model, future internal considerations as its applicability to other health care settings will be discussed.