This study was conducted to examine the contribution of Conflict management on Employee’s performance at Dar es Salaam Maritime Gateway Project (DMGP). Specifically, the study intended to identify the structure of communication flow at DMGP to establish the conflict resolution techniques at Dar es Salaam Maritime Gateway Project, and to associate practiced Conflict resolution approaches with employees’ performance in Dar es salaam Maritime Gateway Project. The study involved 45 technical staff and the sample was framed conveniently while respondents were selected purposively. The data was coded then analyzed through SPSS. The findings have revealed that employees’ fear to speak out their inner concerns to supervisors because of insecurity of their job despite having a chance to express their opinions. It was also relieved that; interpersonal conflicts were predominantly solved by involving the conflicted. Workers at DMGP prefer more settling their issue with their immediate supervisor than third parties. Also, the training and development offered at DMGP has significantly contributed to the performance of employees in different departments. Generally, it was revealed that conflict management has significant contribution to employees’ performance. The study recommends to managers to enhance interpersonal relationships amongst co-workers to inculcate trust, unleash communication and consequentially boost morale of the employees.