This study examines the role of the work environment and organizational culture in supporting employee work effectiveness at PT PGAS Telekomunikasi Nusantara (PGNCOM) Cilegon Branch. The study used a quantitative correlational survey with a saturated sample of 38 employees. Data were collected through questionnaires and analyzed using multiple linear regression with SPSS. The findings indicate that the work environment has a positive and statistically significant relationship with work effectiveness (β = 0.495; t = 2.965; p = 0.005), while organizational culture also shows a positive and statistically significant relationship (β = 0.418; t = 2.506; p = 0.017). Simultaneously, both predictors are statistically significant (F = 64.028; p < 0.001), with R² = 0.409, indicating that 40.9% of the variation in work effectiveness is explained by the two variables in the model. The findings reinforce recent evidence that physical and psychosocial work conditions, together with shared organizational values and behavioral norms, are relevant to employee effectiveness. The study recommends improving workspace comfort, communication, work-safety compliance, role clarity, and reinforcement of organizational values.
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