One of the most significant technological advances to emerge during the last decade is Enterprise Resource Planning (ERP) systems-also called simply Enterprise Systems (ES). Both ERP and ES are industry terms for a broad set of activities supported by multi-module application software that integrates all business processes and data into a single system and thus helps a business to better manage the important parts of its daily operations. The problems that frequently appear in job performance when an ERP system is implemented indicate that organizations often find it difficult to master this industry tool. The purpose of this empirical study is to identify and assess the impact of ERP system implementation on job performance, based on the results of a questionnaire designed to measure five critical factors-task productivity and innovation, customer satisfaction, management control, interdepartmental communication and cooperation, and data analysis and conversion. The Likert scale was applied to 89 usable responses, and the analytical results show that there is a highly significant relationship among all five identified factors of the independent variables and the job performance.