Abstract: This study aims to determine the effect of Leadership and Organizational Culture on employee performance at PT. Pertamina EP Limau Field. The population in this study were all employees of PT. Pertamina EP Limau Field as many as 115 employees. The method of collecting samples in this study using the census (saturated sample) method. The results showed that Leadership and Organizational Culture had a positive and significant influence on the performance of PT. Pertamina EP Limau Field and Organizational Culture have the most dominant influence on the performance of employees of PT. Pertamina EP Limau Field. For further research it is recommended to add other variables that affect employee performance such as motivation, compensation, skills, competence, motivation, commitment, facilities and infrastructure, stress levels and work environment.