This study aims to determine the effect of supervision, occupational safety & health, and compensation to employees job satisfaction at PT. Surya Intisari Raya II Sungai Mandau in Kabupaten Siak. The populations in this study include of all permanent employees at PT. Surya Intisari Raya II Sungai Mandau, totaling 96 people. Primary data collected by the questionnaires as an instrument to pr…