The purpose of this study is to influence the organizational culture on the performance of employees through the work environment at the KSOP Class III Tarakan.Result of research and data analysis found organizational culture have significant effect to work environment with t value counted 2,597 with significant 0,013 less than 0,05. The organizational culture directly affects the employee performance significantly with the proven t value of 4.467 with a significance value of 0.000 and smaller than 0.05. Work environment t value of 3.366 with a significance value of 0.002 and smaller than 0.05 means there is a positive and significant influence between work environment variables on employee performance. Given the magnitude of F value= 24.360 with a significance of 0.000 smaller than 0.05 together the organizational culture variables and work environment have a significant effect on employee performance. Proven direct influence of organizational culture on employee performance with a coefficient of 0.501 is greater than the indirect influence of the culture of the organization through the work environment with a coefficient of 0.137, so the direct effect is more dominant than the indirect effect.