Human resources are very important for companies or government agencies in managing, organizing, and utilizing employees, so that they can function productively to achieve the goals of the company or government institution. Human resources in companies or government institutions need to be managed professionally in order to realize a balance between the needs of employees and the demands and capabilities of the company’s organization. This study aims to determine whether work motivation and work environment affect employee performance through work discipline as an intervening variable at the Labuhanbatu District Education Office. The study was conducted on 61 employees using saturated sampling techniques. The data collection techniques used are primary data in the form of questionnaires and secondary data obtained through documentation studies. The data analysis technique uses quantitative data processed with the SPSS version 25 program, namely t test, sobel test and path analysis. The results obtained in this study show that 1) there is a significant influence between work motivation on work discipline, 2) there is a significant influence between work environment variables on work discipline, 3) there is a significant influence between work motivation variables on performance, 4) there is a significant influence between work environment variables on performance, 5) there is a significant influence between work discipline variables on performance, 6) work discipline variables cannot affect work motivation variables to performance, 7) work discipline variables cannot affect work environment variables to performance.