A Dissertation submitted in partial fulfillment of the requirement for the award of the Master Degree of Business Administration in Corporate Management (MBA-CM) of Mzumbe University.The research intended to investigate the service quality in social security scheme in Tanzania, whereby the objective of this study is to identify factors that affect service quality in social security schemes, to evaluate factors with significant contribution to customer satisfaction in service organization as well as to determine ways for improving service quality in social security schemes. The evaluation was done to determine service quality in social security scheme in Tanzania at NSSF Tanga regional office whereby the respondents who were NSSF Members, NSSF pensioners and NSSF workers responded that good customer services offered as one among the factors contributing to service quality in social security scheme. The target population of the research also involved both male and female who are NSSF members, NSSF workers and NSSF pensioners. A sample size of 50 was drawn. Simple random sampling method was adopted in selecting a sample size because it is based on the subjective judgment of the researcher, rather than random selection Also, the main instrument which was used in collecting data was questionnaire method since it keep large amount of information and relatively easy to analyze during data analysis. Education towards importance of pensions funds, should be increased so as to improve service quality provided by NSSF due to the fact that the fund could improve the service quality to its customers Furthermore, consideration of views and amend Act and modernization of social security system should be modified as a way of improving service quality among pensions funds in the country.