Purpose: This study aims to examine the effect of human resource development policy implementation and leadership style on the performance of subdistrict government officials, with work discipline as a mediating variable in East Kutai Regency. Research Methodology: This study used a quantitative, hypothesis-testing approach with 210 purposively selected government apparatus respondents from the East Kutai Regency. Data were collected using structured questionnaires on a five-point Likert scale and analyzed using SmartPLS 3.0 software. Results: The results show that the implementation of human resource development policies does not significantly affect government apparatus performance, whereas leadership style has a positive and significant effect. Both human resource development policies and leadership styles significantly influence work discipline, which in turn positively affects performance. The coefficient of determination (R²) indicates that 54.6% of work discipline and 49.6% of government apparatus performance are explained by the model, suggesting moderate explanatory power. Conclusions: Work discipline mediates the effect of leadership style and human resource development policies on government official performance, while effective leadership and HR policies improve discipline and organizational performance. Limitations: The study is limited to subdistrict government officials in East Kutai Regency and uses a cross-sectional design with perception-based questionnaire data. Contributions: This study enriches contemporary Strategic Human Resource Management and Path-Goal Leadership Theory perspectives by examining work discipline as a potential mechanism linking HR development policies and leadership style to government apparatus performance.
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