Abstract: The purpose of this study is to understand and describe the impact of organization culture and job satisfaction on organizational commitment, and its implementation on organizational citizenship behavior (OCB) for employees of PT. Bali Towerindo Sentra Tbk. This research is an explanatory survey quantitative research. Data were analyzed by the method of Structural Equation Modeling (SEM), and processed using SmartPLS 3.2.7. The data used a questionnaire, with the number of respondents as much as 135 peoples. The results of this study indicate that: 1) organizational culture has a positive and significant effect on organizational commitment to OCB, (2) job satisfaction has a positive and significant effect on organizational commitment but does not have a direct effect on OCB, (3) organizational commitment has a positive and significant effect on OCB, (4) organizational culture and job satisfaction simultaneously effect organizational commitment and (5) organizational culture, job satisfaction and organizational commitment have a simultaneous effect on OCB.