In which ways do UN organizations carry out their multilateral development cooperation individually, as well as in cooperation with other organizations? This study answers this question from a public-management perspective. Such a perspective has rarely been used in the study of international organizations. In particular, the theoretical topics of governance, program management, and coordination in and among UN organizations are reviewed. This study deals in particular with the United Nations Populations Fund (UNFPA) and the United Nations Children's Fund (UNICEF) and their coordinated behaviour in the Joint Consultative Group on Policy (JCGP). This work is of interest and will be of use for managers in multilateral organizations and academics studying the functioning of these organizations.