This study aims to analyze the influence of organizational culture on employee performance, the influence of the work environment on employee performance, and the simultaneous influence of organizational culture and the work environment on employee performance at PT Santos Jaya Abadi. The study population consisted of all employees of PT Santos Jaya Abadi who met the criteria as research respondents. A non-probability sampling technique using the purposive sampling method was employed, resulting in a sample of 50 respondents. The study utilized a quantitative approach with a survey method. Data were collected through questionnaires and analyzed using multiple linear regression, preceded by validity, reliability, and classical assumption tests (specifically normality and heteroscedasticity tests). The results indicate that organizational culture has a positive and significant effect on employee performance, with a calculated t-value of 2.132 and a significance level of 0.038. The work environment also has a positive and significant effect on employee performance, with a calculated t-value of 2.841 and a significance level of 0.006, and it is the variable that exerts the most dominant influence. Simultaneously, organizational culture and the work environment have a positive and significant effect on employee performance, with a calculated F-value of 8.852 and a significance level of 0.001. The Adjusted R-Square value of 0.274 indicates that these two variables explain 27.4% of the variation in employee performance. The study concludes that enhancing organizational culture and creating a conducive work environment play a crucial role in improving employee performance at PT Santos Jaya Abadi. Keywords : Organizational Culture, Work Environment, Employee Performance.
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