This research was designed to examine the relationship between project manager leadership styles and project success. The Multifactor Leadership Questionnaire (MLQ form 5X) and the Project Implementation Profile (PIP) were used to evaluate whether a relationship existed between a project manager leadership style and project success. The research design was a quantitative correlational study to reveal the relationship between project manager leadership and the impact on project success depending on several critical success factors. The correlational approach examined a relationship between the independent variables, leadership styles, and dependent variable, project success. The study consisted of 52 project managers that showed minor support for a project manager leadership style having an impact on project success; however, transformational, transactional, and laissez-faire leadership have specific project success factors that insignificantly correlate. Each leadership style did not rank higher than the 70th percentile of the normed population, while the project success factors on average ranked in the 60th percentile, which is fair. Based on this study, one suggestion for future research would be to change the research perspective to evaluate leadership styles and project success related to various industries.
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