Abstract
This research is proposed to determine factors affecting organizational citizenship behavior (OCB), tested on counselors, totaling 156 respondents. This study applied three waves in data collection with an interval of 30 days and a multigroup analysis to validate OCB. The analysis technique used is the Structural Equation Modeling (SEM) method using the IBM SPSS AMOS v26. The results showed that transformational leadership and psychological capital could, directly and indirectly, influence OCB and substantially affect work engagement as the mediator. Furthermore, male counselors with OCB were more dominantly influenced by work engagement, whereas female counselors were by transformational leadership. The results of this study can be used as a basis for policy recommendations by organizational management, especially organizations in the public service. This research has strengthened the empirical foundation on voluntary extra-role behavior and initiatives that can improve organizational effectiveness. This behavior can be manifested by strengthening psychological capital, transformational leadership, and work engagement.