This report provides an in-depth analysis of personal leadership within an organizational context, focusing on the application of various leadership styles and theories. The study uses the Leadership Thinking/Mindset System model to evaluate different leadership mindsets and their impact on organizational performance. It explores leadership styles such as autocratic, democratic, and charismatic leadership, alongside theories like trait, behavioral, and situational contingency theories. The report includes a self-evaluation, highlighting the importance of communication, empathy, analytical skills, and influence in effective leadership. Furthermore, it examines the impact of leadership styles on employee performance, potential improvements, and personal leadership qualities within the organization, including strengths, areas for growth, and a plan for future role development. The analysis also aligns personal leadership styles with organizational needs and proposes a focus on sustainable and complex leadership mindsets for 21st-century business challenges. The report concludes with recommendations for enhancing leadership effectiveness within the organization.