Goal 17 of the sustainable development goals (SDGs) attracted attention to the importance of partnerships between governments, the private sector, and nonprofit organizations (NPOs) for sustainable development. This paper aims to analyze the processes of establishing and operating the partnerships between NPOs and other actors in terms of governance. The best practices for partnership governance were examined according to the partnering life cycle framework. A simple random sample of 184 NPOs in six regions of Saudi Arabia was selected for data collection. These organizations were analyzed according to their governance practices in 937 partnerships established during 2016-2018. The findings showed that the organizations had strongly implemented the phases of building and scoping and managing and maintaining, while their governance practices regarding phases of reviewing and revising and sustaining outcomes ranged between moderate and low levels. The results also revealed significant differences between the overall implementation of the partnering life cycle practices and the NPO's year of establishment. It was concluded that analyzing the current situation of implementing the best practices of partnership governance is useful to explore the efficiency and effectiveness of partnerships between NPOs and other actors, as well as the existing policy gaps, so as to create and implement sustainable-oriented partnerships.