This research utilizes human capital theory as a theoretical perspective to empirically investigate the role of achievement motivation as a moderator in affecting competences and work experience on the performance of school supervisors. In this case, the research respondents involved were 99 high school and vocational school supervisors in Riau. The data obtained was processed using PLS structural equation modeling (SEM). This study proposed achievement motivation as a strategy to improve the performance of school supervisors. The research results further showed that competences and work experience affect the performance of high school and vocational school supervisors in Riau. However, achievement motivation has no effect on the performance of high school and vocational school supervisors in Riau. In this case, achievement motivation does not moderate the effect of competences and work experience in improving the performance of high school and vocational school supervisors in Riau. These results indicate that competences and work experience strengthen the human capital theory concerning the school supervisors' work plans and performance achievement supported by appropriate competencies and adequate work experience.