To have successful career, one must acquire the competencies relevant to his/her business field. In order to share the knowledge in a successful and effective manner, individuals need to have knowledge sharing competencies. These competencies could affect and enhance individual performance. The purpose of this study is to investigate the impact of knowledge sharing intention on knowledge sharing competencies and also the impact of those competencies and knowledge sharing intention on managers’ performance in project-based organizations. Data is collected from 50 participants including top, middle and executive managers and also senior engineers. Statistical estimation methods and path analysis were utilized to test the hypotheses. The findings indicates that knowledge sharing intention not only has a positive and significant, direct impact on knowledge sharing competencies but also has a positive and significant, indirect impact on managers’ individual performance via knowledge sharing competencies. This study suggests that due to knowledge sharing intention, one can enhance his/her individual performance by developing the methodological competencies.