This paper aim is to empirically investigate the effect of leaders' Imposterism on organizational silence in the Egyptian construction sector. Organizational silence has been shown to reduce innovation and compromise performance in various types of organizations. Also organizational silence has never been studied before with Imposterism pheromone. Construction professionals in Egypt are often susceptible to Imposterism due to the fast-paced nature and rate of growth of this demanding industry. Leaders' Imposterism is measured using “Clance Impostor Phenomenon Scale", while organizational silence is measured using Brinsfield (2013) scale.  After utilizing simple random sampling, 387 respondents completed the online survey, the data was then tested using multiple regression analysis. The analysis revealed the impostor phenomenon is a significant predictor of organizational silence, where Imposterism has a significant effect on all organizational silence dimensions, namely defensive silence, diffident silence, and acquiescent silence. Finally, practical recommendations were offered as well as directions for future research.