Adetomiwa Folahan T.Gberevbie Daniel E.2025-05-092022-12https://repository.covenantuniversity.edu.ng/handle/123456789/49580Scholars have examined the connection between employees’ evaluation systems and job performance from different perspectives and work outcomes. This study, however, goes beyond measuring actual performance against expected performance, work behaviours, accomplishment, impact on productivity, and other general impacts on employees’ work life. It assesses specific impacts of the evaluation system on-the-job development of the employees, giving a personal and empirical account of their growth while at work. In this regard, the study investigated the impact of the evaluation system on job performance in Lagos State Local Government Service Commission (LSLGSC). The study revealed that the employees’ appraisal system significantly impacts their job performance in the LSLGSC. This was reinforced as the respondents with a high majority (73.3 percent) agreed that their job performance is facilitated by a satisfactory functioning of the evaluation system. The study recommends that employees should be evaluated based on performance factors, which are essential for the employee and the organisation’s survival and growth.enEvaluation system  Job performance  On-the-job development  Perception  Lagos StateArticle