This quantitative study aims to discuss the impact of Islamic ethics in both the organizational behavior citizenship and job performance, as well as the role of organizational citizenship behavior as a mediator between Islamic work ethics and performance. The study population consists of (561) academic staff in the faculties of Applied Sciences in the governorates of: Nizwa, Sohar, Salalah, Tire, Ibri and Al Rustaq in the Sultanate of Oman. A random sample of (366) academics was selected. The researcher designed a questionnaire, which was adopted by many studies, and was arbitrated by five scholars, then conducted an exploratory study on a sample of (40) to test the validity and the extent of the sample's understanding of its contents and understanding of its paragraphs. The stability of "Kronbach Alpha" was (89). Then the questionnaires were distributed to the study sample.