Abstract
Leaders attempt to provide opportunities for the development of organization through leadership style. Transformational leadership is one such style that integrates the factors of “sympathy, consideration, understanding, associating and invention (Jin, 2010). Tacit knowledge is an essential factor in the growth of any organization and it provides a momentous part of all the properties compulsory to organizational growth. Tacit knowledge is now considered as a competitive advantage in organization. The study focuses on the impact of Transformational Leadership (TL) on Tacit Knowledge Management (TKM) in the existence of Organizational Culture (OC) and Motivation (M). Quantitative research design is used along with stratified random  sampling type of probability sampling technique. Data was collected from 255 respondents as middle level managers, lower level managers, and technicians to examine the model in the  petroleum industry of Pakistan. Furthermore, data was tested through correlation and regression analyses. The results proved positive impact of TL on TKM which means that enhancing  participation of staff in Leadership, the participation of employees in TKM increases. The relationship role of mediating variables was also positive which means that OC and M have very crucial  role in the work environment Viz-a-viz human resource and performance of organization.
Key Words: Transformational Leadership, Organizational Culture, Competitive Advantage, Tacit Knowledge Management