This study analyzed JS as a mediator of the relationship among growth satisfaction, supervisory support, self-efficacy, and job performance. The social exchange theory is reviewed in this study as a hypothetical perspective, which shows the improvement of the hypothesis. A quantitative approach was utilized for this action; 350 questionnaires were distributed in the services sector in Karachi. A sample size of 287 was utilized for the test study. Smart PLS have been utilized as test analysis, and their outcome demonstrates the partial mediation of JS on the relationship among growth satisfaction, supervisory support, self-efficacy, and job performance. The study especially discovered that supervisory support is significantly linked with JS while significantly also linked with job performance. Additionally, self-efficacy is negatively insignificantly linked with JS but significant with job performance. Meanwhile, growth satisfaction is insignificantly linked with JS and significant with job performance. However, JS is significantly linked with job performance.