This research investigates the extent to which workplace well-being and psychological safety are linked to work engagement among staff at PT Perkebunan Nusantara IV Regional I Medan. Using a quantitative approach, 84 employees were recruited through purposive sampling, and their questionnaire responses were analyzed in IBM SPSS Statistics 25 by descriptive statistics, validity and reliability checks, classical assumption testing, multiple regression, partial and simultaneous significance tests, the coefficient of determination. These results show that although workplace well-being is positively related to work engagement, the relationship does not reach statistical significance (t = 1.593; Sig. = 0.115 > 0.05). Psychological safety, by contrast, is positively and significantly related to work engagement (t = 6.492; Sig. = 0.000 < 0.05). When examined together, both variables significantly predict work engagement (F = 120.246; Sig. = 0.000), explaining 74.8% of its variance (R² = 0.748), with the remaining 25.2% attributable to factors outside the model. These findings suggest that psychological safety is the more influential factor, whereas workplace well-being on its own is not a statistically significant predictor though combined, the two variables play a meaningful role in shaping work engagement among PTPN IV Regional I Medan employees.
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