- The decline in employee performance so that the resulting work results are less than optimal, is the beginning of a phenomenon in a company. This study aims to measure the influence of work environment, motivation and turnover on employee performance at PT. GREATWALL DRILLING ASIA PACIFIC. The data analysis used is multiple linear regression analysis. This type of research is quantitative. The sample subjects in this study were 65 employees of PT. GREATWALL DRILLING ASIA PACIFIC. The results of multiple linear regression analysis show that partially and simultaneously environment work, motivation, turnover and employee performance have significant effect toward employee performance

Keywords : Environment Work, Motivation , Turnover and Employee Performance.