Dissertation (MA Public Administration)The Public sector is contributing much in the economic growth of any country thus it needs to be handled with care and improved at large. There is a problem of performance in these public sectors especially in developing countries. Such problems are of two sides such as basing on economic situation of the Public sectors, employees and employers problems as a result that all parties have to collectively cooperate to overcome the problems within their work places so that to improve performance and reduce unimportant grievances that lead to strikes or cold strikes of absenteeism with low performances. This study was designed to determine the causes and solution of disputes in public sector in Tanzania and the case study was Tabora Urban Water Supply and Sanitation Authority (TUWASA). Specifically, the study aimed at identifying the core problems that lead to disputes in public sectors like TUWASA, finding out the causes of disputes in public sectors like TUWASA and finding out possible ways/strategies that can help to avoid/minimize disputes in public sectors. To achieve these objectives, the researcher‟s own developed conceptual framework was used. Methods used in a study were both qualitative and quantitative approaches. The two approaches facilitated the collection and analysis of data and the results were presented in terms of thematic descriptions and statistics were presented using both tables and graphs. The study was situated in a single district namely Tabora and one public office was involved. The findings of this study show that there are five core problems that challenge public sector offices such as: managerial problems, accumulation of unpaid workers‟ rights, interference of politics in day to day decision making, and lack of funds. Lastly, Managers should make sure that all workers‟ grievances are cleared out before they develop into a big dispute.