Lecturer performance is the real behaviour displayed by a lecturer and as a work achievement that can be produced according to his role as an academic staff. The quality of graduates in higher education is related to the performance of lecturers in the fields of education, research, and community service. Improving lecturer performance requires the commitment of university leaders to make changes to the environment. This study aims to analyse the effect of transformational leadership on knowledge sharing and lecturer performance with moderation of change adaptability. The research was conducted at Universidade Nacional Timor Lorosa'e (UNTL) with a sample of 201 lecturers. The data that has been collected is analysed with descriptive and inferential analysis of Smart PLS.3. The results showed that transformational leadership has a significant effect on knowledge sharing and lecturer performance. Knowledge sharing has a significant effect on lecturer performance. It was also found that knowledge sharing partially mediates the relationship between transformational leadership and lecturer performance. Other findings show that change adaptability does not moderate the effect of transformational leadership on knowledge sharing. The implications of the research show that the limitations in making changes are due to difficulties in communicating between lecturers. Cultural factors, especially language, are the main barrier in change adaptability when conveying new ideas that are useful for institutional development.