This dissertation aims to examine the relationship between interorganizational collaboration and the implementation of urban greening policy. Specifically, it discusses bonding and bridging relationships that explain a successful interorganizational collaboration, and to what extent these factors explain the perception of success in the implementation of public programs. The effects of risks of collaboration on the implementation of urban greening policy are also studied. To frame the analysis, this dissertation uses Feiock's institutional collective action (ICA) framework, which aims to understand successful interorganizational collaboration and policy implementation across sectors. The collection of data was carried out in Riyadh City in Saudi Arabia, which is located in the center of Saudi Arabia. In this study, the unit of analysis is the networks of relationships among organizations that work with the Royal Commission for Riyadh City (RCRC). The data were obtained from 44 organizations collaborating to implement urban greening projects in Riyadh City and were collected over 17 days from June 15, 2019 to July 2, 2019. The sampling technique used in this study was snowball sampling. The main statistical methods employed for hypothesis examination were social network analysis (SNA) and ordinary least squares (OLS). The key empirical results indicated that there were 12 major organizations most central within the network (i.e., 11 public organizations, and 1 private organization). Also, the findings revealed that among the 12 organizations, the most central organization within the network was the Ministry of Environment, Water, & Agriculture. Further, the empirical findings indicated that bonding relationships among organizations increase the levels of perceived success in the collaboration to implement urban greening projects. The results indicated that network betweenness (bridging) has no statistically significant effect on the perceived success in interorganizational collaboration. The findings revealed that the three categories of collaboration risks, coordination problems, division problems, and defection problems have no statistically significant effects on perceived success in the collaboration to implement urban greening projects. Overall, the hypotheses were partially supported by the results of the analyses. This dissertation builds upon and expands the application of the ICA framework by using it in an international context. It can inform public managers in public organizations in addition to other organizations that work in a variety of areas regarding the implications of collaborative work. The results may encourage organizations to successfully collaborate with other organizations in adopting policies for climate change adaptation such as urban greening to mitigate the effects of future climatic events. Finally, this study indicates its limitations and future research directions.