This study aims to analyze the influence of transformational leadership and work motivation on employee performance through job satisfaction as an intervening variable in the Human Resources Bureau of the North Sumatra Regional Police. Employee performance is an important factor in achieving organizational goals, so leadership that is able to provide inspiration, strong work motivation, and job satisfaction that supports performance improvement is needed. This study uses a quantitative approach with a population and a sample of 115 employees of the Human Resources Bureau of the North Sumatra Regional Police using a saturated sampling technique. Data was collected through the distribution of questionnaires with a Likert scale and analyzed using the Partial Least Squares Structural Equation Modeling (PLS-SEM) method with the help of the SmartPLS application. Model testing is carried out through external model and inner model analysis to test the validity, reliability, and relationship between research variables. The results of the study show that transformational leadership has a positive and significant effect on employee performance and job satisfaction. Work motivation also has a positive and significant effect on employee performance and job satisfaction. Furthermore, job satisfaction has a positive and significant effect on employee performance. The results of the mediation test showed that job satisfaction was able to mediate the influence of transformational leadership and work motivation on employee performance. The R-square value shows that transformational leadership and work motivation are able to explain job satisfaction by 38.6%, while transformational leadership, work motivation, and job satisfaction can explain employee performance by 53.8%.