This study aims to examine the effect of job satisfaction on employee performance through the mediating role of organizational citizenship behavior (OCB) at PT XYZ, a restaurant company in Semarang City. The study used a quantitative approach with a total sampling method, so that the entire population of 133 employees was involved as respondents. The data analysis method used was path analysis using SmartPLS to test the direct and indirect relationships between variables. The results showed that all hypotheses were accepted. Job satisfaction significantly influenced employee performance (β = 0.438; p = 0.000) and also significantly influenced OCB (β = 0.501; p = 0.000). In addition, OCB significantly influenced employee performance (β = 0.945; p = 0.000). Another important finding is the mediating role of OCB in the relationship between job satisfaction and employee performance (β = 0.473; p = 0.000). The results of this study provide practical implications for organizations, especially in the context of human resource management, that efforts to increase job satisfaction can be an important strategy in strengthening positive employee behavior and organizational performance.
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