This study examines how work ethic, job satisfaction, and leadership affect employee performance at Sarkies Aisyiyah Hospital Kudus. The researchers used a quantitative survey of 200 employees. The researchers used SmartPLS to analyze data. The results demonstrate that work ethic and job satisfaction exert positive and significant effects on leadership. Furthermore, work ethic, job satisfaction, and leadership each have positive and significant effects on employee performance. Mediation analysis confirms that leadership positively and significantly mediates the effects of work ethic and job satisfaction on employee performance. The research model exhibits strong explanatory power for the performance variable. These findings confirm that creating a work ethic culture, job satisfaction, and effective leadership can boost employee performance. Leadership strategically maximizes individual contributions to organizational sustainability.
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