Save Street Child (SSC) is a nonprofit organization in which its main activity is focused on the empowerment of the street children. This research aims at analyzing the effect of organizational culture on organizational commitment, analyzing the job satisfaction as the mediating variable of the organizational culture’s influence on the organizational commitment, and analyzing the volunteering tenure as the moderating variable of the organizational culture’s influence on the organizational commitment. This research involved all of 63 volunteers in SSC organization in Malang City as respondents. Closed questionnaires were used to collect the primary data. Further, the data were analyzed by using the PLS (Partial Least Square). The research results show that the organizational culture affects the job satisfaction, whereas the organizational culture does not have any influence on the organizational commitment. In addition, the job satisfaction influences the organizational commitment, and it also becomes the mediating variable of the influence of the organizational culture on the organizational commitment. The last finding also shows that the volunteering tenure is not the moderating variable of the organizational culture’s influence on the organizational commitment. This study is useful for understanding organizational culture, job satisfaction, and organizational commitment in nonprofit organizations.