Construction management, from the contractor's perspective, is led by the Construc-tion Manager (CM). The work motivation and leadership style of the CM are critical variables for the successful execution of construction projects. Scientific literature identifies participative leadership as the most effective style for mitigating conflicts among various stakeholders. However, analyzing the specific variables that influence a CM's conflict resolution capacity remains an underexplored area. Furthermore, while the CM must act as a leader for their team (subcontractors, suppliers, etc.), they remain accountable to the contractor’s senior management. Therefore, this study aims to ana-lyze the mediating role of CM motivation in the relationship between leadership and conflict resolution capacity using Partial Least Squares Structural Equation Modeling (PLS-SEM). This research contributes to identifying the factors that influence the CM’s conflict resolution capacity during the execution phase, thereby enhancing best prac-tices in knowledge management within the construction industry.