The purpose of this study is to determine the effect of work motivation and leadership on job satisfaction and its implications on employee performance. A total of 355 samples of Bukit Asam Coal Mining Company Ltd. in Indonesia were selected proportionally with random sampling. Data were obtained through questionnaires. Data analysis technique employed structural equation modeling (SEM) with AMOS 22. The results of the study show that leadership and work motivation have a positive and significant effect on job satisfaction. Leadership has a more considerable influence (0.263) than work motivation (0.171) toward employee job satisfaction. The influence of leadership towards job performance is 0.175. The influence of work motivation towards job performance is 0.166. Job satisfaction has the most dominant influence (0.363) towards employee performance. The direct effect of leadership on employee performance is 0.175 greater than the indirect influence of leadership on employee performance through employee job satisfaction, which is only 0.096. Likewise, the direct effect of work motivation towards employee performance is 0.166 greater than the indirect effect of work motivation towards employee performance through employee job satisfaction, which is only 0.062. Thus, job satisfaction does not mediate the effects of leadership and work motivation toward employee performance.

Abstract
1. Introduction
2. Literature Review and HypothesisDevelopment
    2.1. The Relationship between Work Motivationand Job Satisfaction
    2.2. The Relationship between Leadership and JobSatisfaction
    2.3. The Relationship between Work Motivationand Performance
    2.4. The Relationship between Leadership and JobPerformance
    2.5. The Relationship between Job Satisfactionand Job Performance
3. Research Methods
4. Results and Discussion
    4.1. SEM Results
    4.2. The Relationship between Work Motivationand Job Satisfaction
    4.3. The Relationship between Leadership and JobSatisfaction
    4.4. The Relationship between Work Motivationand Job Performance
    4.5. The Relationship between Leadership and JobPerformance
    4.6. The Relationship between Job Satisfactionand Job Performance
5. Conclusion
References

• Irwan PANCASILA(Universitas Tridinanti Palembang)
• Siswoyo HARYONO(Doctoral Management Program, Postgraduate Studies, Universitas Muhammadiyah Yogyakarta) Corresponding Author.
• Beni Agus SULISTYO(Universitas Muhammadiyah Yogyakarta)