In this paper, we examined managers' leadership behavior when working on a simulated team project regarding task-oriented versus relationship-oriented leadership behavior to effectively achieve successful project completion. Managers attending an advanced project management development program responded to the Fielder Leadership Behavior Style Self-Assessment, which is a useful framework to determine task-oriented versus relationship-oriented leadership behavioral styles. The degree of task-oriented versus relationship-oriented leadership behavior styles was assessed to determine the approach taken by the managers for achieving successful project completion. A Pearson's chi-square test was conducted to determine whether the observed values were significantly different from an expected value of five. The findings can contribute to better understanding the leadership styles, which characterize project management accomplishment.