O Occupational safety and health (osh) plays an essential role in supporting the operational activities of mrt jakarta dukuh atas station, where complex work processes may increase the risk of workplace accidents. this study aims to analyze the effect of the occupational safety and health management system (smk3), compliance with personal protective equipment (ppe) usage, and the implementation of hazard identification, risk assessment, and risk control (hirarc) on workplace accident risk. this research employed a quantitative approach using a descriptive method. data were collected through questionnaires distributed to 42 respondents and analyzed using multiple linear regression with the assistance of spss software. the results indicate that the implementation of smk3 has a significant effect on workplace accident risk. in contrast, ppe compliance and hirarc implementation do not have a significant partial effect. however, all three variables simultaneously have a significant influence on workplace accident risk, with a coefficient of determination of 76.2%. the study concludes that consistent implementation of smk3, supported by compliance with ppe usage and continuous implementation of hirarc, can improve the effectiveness of workplace accident risk control in the operational activities of mrt jakarta dukuh atas station.keywords: (smk3), personal protective equipment (ppe), hazard implementation, workplace accident risk, mrt jakarta.