This study explores how organizations that conduct scientific research support communication activities, including activities aimed at fostering public engagement. It uses qualitative, thematic analyses of semi-structured interviews to propose an initial partnership categorization based on the degree to which communication support is embedded within or external to the organization, as well as the degree to which engagement resources are pooled across funding sources. It then discusses how different categorizations might be associated with several different metrics of public engagement quality. Findings suggest that partnerships with external groups that have shared goals can enhance engagement efforts in situations where the organization lacks the resources to build internal engagement teams and programs. These findings challenge past work focused on the value of internal communication infrastructure. However, the potential benefits and limitations of different approaches to within-organization versus external-to-organization communication support need further research.