A population-level approach to deliver parenting and family support is a necessary but neglected approach needed to reduce the high prevalence of emotional/behavioral problems in children, decrease inadequate and potentially abusive parenting practices, and to provide improved parenting support to all parents within a specified population. We examined the initial feasibility of a large-scale professional training regimen to prepare existing service providers to implement an evidence-based preventive intervention in the realm of parenting and family support. Data from the U.S. Triple P System Population Trial are used to illustrate how a parenting and family support intervention can be successfully disseminated to a large, multidisciplinary workforce. We discuss lessons learned from this dissemination effort as well as implications for population-based approaches to child and family well-being.