This study aims to determine the effect of work environment, work discipline and job satisfaction on employee performance at PT. Eka Timur Raya Paguyangan. The total population of this study was 218 employees. The sample in this study was 142 employees using purposive sampling technique. The analysis used is, t test and R2 adjusted. The results of this study based on the t-test obtained; (a) Work environment has a positive and significant effect on employee performance. (b) Work Discipline has a positive and significant effect on employee performance. (c) Job Satisfaction has a positive and significant effect on employee performance. Based on the coefficient of determination R2adjusted shows the magnitude of the influence of Work Environment, Work Discipline, and Job Satisfaction on Employee Performance by 14.3%, while the remaining 85.7% is influenced by variables outside the research model.