The purpose of this paper is to assess the impact of performance appraisal on job performance focusing on the role of Motivation in the governmental sector in Qatar. While many organizations consider performance appraisal (PA) an important tool to measure and evaluate employees' performance, PA can be used as an effective tool to maintain the capabilities and effectiveness of the workforce. In general, PA can be a crucial tool to motivate employees and leverage their job performance and thus can be considered as a competitive advantage over rivals. This paper has identified main factors of PA from the previous pieces of literature and prioritized the most influencing factors affecting PA such as purpose (PAP), criteria (PAC), leadership (PAL), and methods of evaluations (PAE) on employee's motivation as well as their relationships with job performance. Besides, the study sought to fill the literature gap on the performance management field in the context of Qatar for future research. In the course of this study, descriptive research design was adopted in the form of a survey. The survey was distributed, and 294 responses were collected. The conclusion of the finding was that the PAP and PAE had impacts on employee's motivation and job performance, while PAC and PAL did not. In addition, the findings illustrate a positive correlation between employee's motivation and performance. Human Resource managers of organizations may use findings to better support employees' motivation and performance.