Human resources that act as implementers are the main aspects of the agency, but often become problems in an organization or agency including the Public Works, Housing and Energy Mineral Resources Office. It was found that employee performance achievements in 2022 did not reach targets throughout the year. In addition, the late attendance rate of employees is above 50% and inadequate facilities and infrastructure. The purpose of this study was to determine the effect of work discipline and work environment on the performance of employees of the Public Works, Housing and Energy Department of Mineral Resources. The research method is casual associative with a quantitative approach. The independent variable is work discipline and work environment, while the dependent variable is employee performance. The research instruments are questionnaires and IBM SPSS applications. Sampling by saturation sampling of 120 respondents. Data analysis techniques are descriptive analysis and multiple regression analysis. The results showed that work discipline and work environment simultaneously had a positive effect on the performance of employees of the Public Works, Housing and Energy Department of Mineral Resources by 0.233 (p<0.05) and 0.389 (p<0.001) respectively with a contribution of 14% (ΔR² =0.140).