This study looks at how work discipline, leadership style, and organizational culture affect both group and individual employee performance at PT. Demosta Berjaya. 35 respondents were chosen using a non-probability sampling technique called saturation sampling as part of a quantitative research strategy. Validity and reliability tests, together with traditional assumption testing, were used to assess the data. The hypotheses were evaluated using t-tests, F-tests, multiple linear regression analysis, and determination coefficient analysis. The findings demonstrate that corporate culture, leadership style, and work discipline all have a simultaneous, positive, and considerable impact on employee performance. Additionally, it was discovered that each of these factors alone had a favorable and considerable impact on PT. Demosta Berjaya employees' performance. These findings demonstrate the vital significance that sustainable and successful human resource management techniques play.
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