This study addresses the impact of intrinsic and extrinsic motivation on job satisfaction among Oil fields employees in the Sultanate of Oman. The study examined the relationships between motivation factors (Extrinsic and Intrinsic) and job satisfaction with gender as a moderator. In order to examine these relationships, a quantitative basic research strategy was used. A questionnaire of 25 items has been distributed to 252 employees working in oil field companies that worked in Oman, i.e., Petroleum Development Oman (PDO), Oman Oil Refineries and Petroleum Industries Company (ORPIC), Occidental Oman (OXY), Schlumberger Oman and Mohammed Al-Barwani Group (MB). With the help of the Statistical Package for the Social Sciences (SPSS V. 23), the questionnaire correspondents data were analyzed and the hypothesis been tested. The study found positive relationships between motivation factors (extrinsic and intrinsic) and job satisfaction. Based on these positive relationships, several recommendations were directed to the management of oil field companies to understand the capabilities and performance of their employees and work to motivate them extrinsically by rewarding them for outstanding performance and appreciate them for accomplishments. This limitation in this research was shortened on the number of research taken in this field in Oman. Therefore, to overcome this limitation, studies from outside of Oman were used.