Purpose: The main goal of this research is to examine the relationship between the organizational culture of PT PLN (Persero) South Sumatera, Jambi, and Bengkulu, as well as the impact of transformational leadership on employee performance. Method: This study's methodology is a quantitative analysis of survey data. The research population consisted of employees of PT PLN (Persero), South Sumatra, Jambi, and Bengkulu. The total sampling method was used. The study sample consisted of 288 participants. The data collection technique used a closed questionnaire from an employee survey. Data analysis was carried out using continuum lines and SEM-PLS analysis as well as hypothesis testing using full model Structural Equation Modeling (SEM) analysis with smartPLS This research was carried out at PLN South Sumatera, Jambi and Bengkulu using quantitative methods. Results: Research shows that organizational culture is strong, transformational leadership is effective, and employee performance is high. In terms of the effects on employee performance, organizational culture is positively and significantly correlated with high scores, while transformational leadership is positively but not significantly correlated. Limitations: Culture, transformative leadership, and performance metrics may be difficult to standardize and use in different work settings. The use of measurement tools that are not valid or reliable can affect the validity of conclusions. Research may be conducted in limited contexts or samples, which reduces the ability to generalize the findings to broader populations or organizations. Other factors outside the organizational culture and transformational leadership, such as economic factors, market conditions, and individual factors, can influence employee performance. The study's limitations in controlling for or including these factors may limit the validity of the findings. Contributions: Aside from contributing to the growth of scientific understanding, this research has the potential to become a business strategy for enhancing the quality of organizational culture in accordance with the mission and vision of the company through the practice of transformational leadership and organizational culture