The purpose of this study was to determine the effect of knowing and analyze non-physical work environment and job satisfaction simultaneously and partially on the performance of employees of PT. Megatama Mestika Jaya Kota Dumai. The population in this study were employees of PT. Megatama Mestika Jaya Kota Dumai totaling 216 people. The samples used were as many as 68 respondents. The sampling …