This study aims to determine the effect of Leadership Style and Work Ethic on Employee Performance of the Tanimbar Islands District Regional Development Planning Agency with motivation as an intervening variable. The object of this research is all permanent employees of BAPPEDA Tanimbar Islands Regency as many as 50 people. The data collection method in this study was carried out by means of a questionnaire (questionnaire), data analysis method in this study is Partial Least Square (PLS) using the SmartPLS 3.2.8 software. The results of this study are. Leadership style has no significant effect on performance but has a significant effect on motivation. Work ethic has a significant effect on performance, but does not significantly influence motivation. Motivation has no significant effect on performance, Leadership Style does not have a significant effect on performance through motivation and Work Ethic does not have a significant effect on performance through motivation.