This study investigates the relationships between servant leadership and team performance with the mediating roles of affective commitment, knowledge sharing, and organizational trust. The background of the research is the petroleum development of Oman. The method used in this study is quantitative by constructing a questionnaire and distributing it to the employees of the petroleum development of Oman. The questionnaire was distributed through social media sites. In addition, I used employee e-mail for the petroleum development of Oman. Data was collected from 252 employees in the petroleum development of Oman. According to analyze and collect the data through the program, its name is Statistical analysis program (SPSS). The findings of this study show that servant leadership has a positive effect on team performance and while affective commitment, knowledge sharing, and organizational trust had a positive relationship as a mediator between servant leadership and team Performance. Also, there is a direct positive relationship between servant leadership and all the mediating variables: affective commitment, knowledge sharing, and organizational trust. Also, we found that the reliability score of servant leadership is (0.922). The findings of this study offer several recommendations. Findings will help leaders in the petroleum development of Oman develop strategies for human resources and know employee strengths that help to increase team performance. Moreover, leaders in the petroleum development of Oman should allow employees to express their opinions and help in making work-related decisions, especially those related to the technical aspects of their work. Leaders are advised to provide the opportunity for employees to innovate and come up with and present new ideas. Such encouragement ensures employee loyalty and continuity of high achievements at work. Keywords: servant leadership, affective commitment, organizational trust, knowledge sharing.