''Conflict is the process of opposition and confrontation that occurs in organizations between individuals or groups. It occurs when parties exercise power in pursuit of valuable goals or objectives and hinder the progress of other parties. '' (Wagner and Hollenbeck 2010, p.227).Oceanic Bank International Plc (OBI) is one of Nigeria's leading financial services institutions. The bank serves customers across all sectors of government, corporate, small and medium enterprises and individuals. This review focuses on issues related to conflicts between marketing and operational functions and performance on OBI. A classic example of organizational conflict is seen in the relationship between marketing or sales and operations or manufacturing (Rotemberg and Saloner, 1995). Shapiro (1977) noted that this was mainly due to a difference in the evaluation criteria of different units. Taking OBI, Nigeria as a case study, marketing staff are evaluated based on the number of businesses they generate, while operational staff are based on how effectively and efficiently they perform their duties while adhering to the bank's policies. Other causes of conflict, highlighted by (Mullins 2005), can be linked to differences in perception, individual attitudes, departmentalization and specialization. This can lead to different responses in individuals and different goals. In this analysis, the effects of conflict on reducing motivation and specialization. Performances are discussed. The advantages of functional conflict over dysfunctional conflict in OBI are analyzed. The importance of communication and resolution approaches is explored. Suggestions on how conflicts can be minimized within the bank are also offered...... in the middle of the document...... and their effects on individuals, groups and organizations are important for appreciate the factors that reinforce and impede group conflict and creates ways to address dysfunctional behaviors and circumstances that lead to conflict and builds ways to encourage functional conflicts that drive business performance and smooth running in OBI. The use of a collaborative approach in conflict management should be encouraged as this will improve teamwork within the bank. Effective coordination and communication that could strengthen team culture and trust in the bank were highlighted. The suggestions made in the report, when implemented, would be beneficial for the bank. They would minimize or eliminate the intensity of conflicts and strengthen the performance of staff and the organization as a whole..