This study investigates how transformational leadership and job satisfaction influence Organizational Citizenship Behavior (OCB), considering organizational commitment as a mediating factor. Data were obtained from 196 civil servants employed at the Inspectorate General of the Ministry of Education and Culture, Jakarta, Indonesia. The analysis was conducted using the Partial Least Squares (PLS) technique. The findings indicate that: (1) Transformational leadership positively and significantly shapes organizational commitment; (2) Job satisfaction exerts a positive and significant impact on organizational commitment; (3) Organizational commitment enhances OCB significantly; (4) Transformational leadership directly strengthens OCB; (5) Job satisfaction also positively contributes to OCB; (6) Transformational leadership indirectly promotes OCB through organizational commitment; and (7) Job satisfaction indirectly promotes OCB through organizational commitment.
