Bekele, Teshome (PhD)Arefaine, Ephrem2018-10-292023-11-042018-10-292023-11-042016-05http://etd.aau.edu.et/handle/123456789/13349This research was conducted mainly to assess which of the three leadership styles is the most dominant style among ethio telecom managers. On top of this, the research also aimed to assess the differences in gender demographic between those represented in each of the three leadership styles as well as the differences between the constructs of extra effort, effectiveness and satisfaction among ethio telecom managers represented in each of the three leadership styles. A descriptive and quantitative research approach was used in this research. Data was gathered through the Multifactor Leadership Questionnaires, MLQ (5X-Short Form). From the total distributed 150 questionnaires, 133 questionnaires were properly filled and returned, with a very high response rate of 88.7%. The findings of this research indicate that the dominant leadership style of ethio telecom managers is Transactional Leadership. The second-most popular style is transformational Leadership followed by passive avoidant Leadership. This research also shows that female leaders are more transformational than males and females are also better in contributing to the outcome than males. The findings on the differences in the responses to the constructs of extra effort, effectiveness and satisfaction of the three leadership styles indicates that transformational leadership has significantly strong positive relationship to extra effort, effectiveness & satisfaction. Based on the result of this research, it is recommended that transformational leadership style should be practiced in ethio telecom so that the leaders can transforms their follower by helping them understand the importance of the organization outcomes, encouraging them to rise above their self-interest to achieve the company goals and objectives. The findings of this research also provided recommendations for future research for those who are interested in leadership studies. Key words: Leadership, Leadership style, Leadership outcomes.enLeadershipLeadership styleLeadership outcomesThesis