The aim of the present paper is to examine the role of personal resources on employees’ job performance and the mediating role of affective commitment. There are three antecedents of affective commitment including self-efficacy, organizational-based self-esteem, and optimism. The antecedents and affective commitment were proposed to enhance employees’ job performance. The data of this study have been collected from a group of employees of Somaliland telecommunication sector through questionnaire survey. The data were analysed using SmartPLS. The findings revealed that both personal resources (self-efficacy, organizational-based self-esteem, and optimism), its second order construct and affective commitment have significant impact on employees’ job performance. To close, affective commitment partially mediated the relationship between personal resources and employees’ job performance.