This study investigates the impact of ethical leadership on task performance in the oil and gas sector in the Sultanate of Oman. It also explores the mediating roles of self-efficacy and job satisfaction in this relationship. The quantitative method was applied, and data was collected by distributing questionnaires to employees in oil companies in the Sultanate of Oman. The survey was distributed through web application platforms. There were 250 respondents from different companies, and data were analyzed using SPSS and Macro PROCESS for mediation analysis. Findings show that ethical leadership was positively correlated with self-efficacy, job satisfaction, and task performance. The data collected from surveys revealed that ethical leaders enhance employees' task performance by boosting their self-efficacy and improving their job satisfaction. All the research hypotheses were accepted. This study proved a direct association between ethical leadership and task performance and the mediating roles of self-efficacy and job satisfaction. The study also concluded with a set of recommendations, the most important of which can be improved performance of employee tasks through ethical leader behavior. Organizations need to hire and promote these employees as leaders who deliver moral values and are committed to those values. Ethical leaders provide support, trust, and care for their followers. Keywords: Ethical Leadership, Self-efficacy, Job satisfaction, Task Performance, Oil & Gas Sector, Sultanate of Om