Background Increasingly, the early childhood care and education policy arena have been subjected to reform efforts as key areas for improving educational, economic, and other outcomes. These efforts include increasing the number of children served, including younger children in these settings, and raising program quality (Kalicki et al. 2017). A knowledgeable and supported early childhood care and education workforce have been identified as a pillar of high-performing systems across the globe (Kagan 2019). Likewise, in the United States, the early childhood care and education workforce has been identified as a leverage point for meeting the goals of access and quality. However, acting on this leverage point by increasing the training and support for the early childhood workforce is complicated by the mixed delivery system in the United States. The early childhood workforce works in a variety of settings, including home child care, child care centers, private preschools, Head Start and Early Start programs, and public schools, which exist within different federal and state funding streams and regulatory frameworks. Early childhood care and education providers are regulated by different state and federal agencies,