This study aims to investigate the influence of work motivation, work culture, work discipline, and work environment on employee performance at PT. Ultiface, with work ethic as the mediating variable. A quantitative method with an associative approach was employed, with a population of 136 employees from PT. Ultiface and a saturated sample of 121 respondents. Data analysis was conducted using Partial Least Square (PLS) version 3.0. The research findings indicate that work motivation (t = 2.757, p = 0.006), work environment (t = 4.765, p = 0.000), and work ethic (t = 4.261, p = 0.000) have a significant influence on employee performance, while work culture (t = 1.825, p = 0.069), work discipline (t = 1.245, p = 0.214), and the intervention of work ethic through work motivation (t = 2.776, p = 0.006) are significant. However, the intervention of work ethic through work culture (t = 0.805, p = 0.421), work discipline (t = 0.121, p = 0.904), and work environment (t = 1.855, p = 0.064) does not show a significant influence on employee performance. This study is expected to provide useful insights for the management of PT. Ultiface in enhancing employee performance through effective management of these factors.
                        
                        
                        
                        
                            
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