This report explores the critical roles of leaders and managers within organizations, focusing on their distinct characteristics and functions. It delves into various leadership theories, including contingency, situational, and system theories, illustrating how these approaches are applied in diverse workplace situations, such as labor turnover and interpersonal conflicts, with a specific focus on the Marriott hotel. The report evaluates the strengths and weaknesses of different leadership approaches, examining the practical implications of transformational, contingency, and system theories. By analyzing these theories and their application, the report provides a comprehensive understanding of effective leadership and management practices, offering insights into how leaders and managers can navigate challenges and foster a positive work environment.