<![CDATA[This study analyzes the roles of human resource optimization and organizational culture in improving educational service quality, with employee performance as a mediating variable. A quantitative, explanatory design was applied to all 32 teachers of SMK Sasmita Jaya 2, who were selected through total sampling. Data were collected using a five-point Likert-scale questionnaire and analyzed with Partial Least Squares–Structural Equation Modeling (PLS-SEM). Human resource optimization (β = 0.471; p < 0.001) and organizational culture (β = 0.348; p = 0.004) had positive and significant effects on employee performance. Both variables also had significant direct effects on educational service quality (β = 0.181; p = 0.039 and β = 0.207; p = 0.021, respectively), while employee performance had the strongest direct effect (β = 0.519; p < 0.001). Employee performance partially mediated the effects of both variables on educational service quality. These findings imply that schools should integrate human resource management and organizational culture with performance improvement as a strategy for strengthening service quality. The small sample from a single school, the cross-sectional design, and the self-reported data limit the generalizability of the findings, so the results should be interpreted with caution.]]>
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