Abstract
It is evident from the existing research that transformational leaders play a vital role toward the project success, but little is known about the channels that elaborate this effect. To unveil one of these channels, this study supposed project teamwork as the mediator between transformational leadership and project success. To test the stated empirical relationship, data were obtained from 125 project managers working on various projects of Higher Education Commission (HEC) of Pakistan. The results revealed that project teamwork partially mediates the relationship between project leadership and project success. The study has also discussed valuable implications including theoretical, practical and managerial.