Abstract. The research problem centers on understanding the intricate relationship between Organizational Citizenship Behavior (OCB) and Employee Green Behavior (EGB) within organizations, particularly regarding increasing environmental challenges and the need for sustainable practices. Despite recognizing OCB and EGB as critical for achieving competitive advantage and fostering a positive organizational culture, there remains a significant gap in the literature regarding how these constructs relate. This study aims to determine organizational citizenship behavior and employee green behavior in a service provider company. This study employed a descriptive-correlational research design and used a researcher-made questionnaire as a data-gathering tool. The total participants was 142 rank-and-file employees in a service provider company in Bacolod City. The researchers employed a simple random sampling technique to choose the samples. The statistical tools utilized were mean, standard deviation, Mann–Whitney U test, Kruskal–Wallis test, and Spearman Rho correlation. The results showed that the overall level of organizational citizenship behavior in terms of altruism, sportsmanship, courtesy, civic virtue, and conscientiousness was good. At the same time, the level of employee green behavior was also good. The level of organizational citizenship behavior, altruism, sportsmanship, courtesy, civic virtue, and conscientiousness, and when grouped according to civil status, revealed no significance. Moreover, the analysis revealed statistically significant differences in dimensions of environmentally friendly practices, specifically in avoiding harm and influencing others. Lastly, the results showed a significant relationship between the extent of organizational citizenship behavior and employee green behavior. Overall, the study provided management insights into sustainable practices and green initiatives.

Keywords: Employee green behavior; Organizational citizenship behavior; Philippines; Service provider.