This report provides a comprehensive analysis of leadership styles applicable to a lean project within the SINTEF organization. It begins with an executive summary and table of contents, followed by an introduction to the concept of leadership styles and their importance in project management. The report delves into various leadership styles including bureaucratic, servant, laissez-faire, and coach-style leadership, with a particular emphasis on the coach-style leadership as the most suitable approach for SINTEF. The characteristics of effective team members are explored, highlighting the significance of self-awareness, commitment, open communication, positivity, and empathy. The report then outlines several tools and techniques that can be implemented across different departments within SINTEF, such as benchmarking, statistical sampling, run charts, cause-and-effect diagrams, RACI matrices, affinity diagrams, and Pareto diagrams. The report concludes by summarizing the key findings and emphasizing the importance of adopting a coach-style leadership approach to enhance individual and team performance within SINTEF. The report underscores how applying lean methodologies and selecting the appropriate leadership style can drive organizational success.