A Dissertation submitted in partial fulfillment of the requirement for the award of the Master degree of Business Administration of Mzumbe University.The research intended to investigate the service quality in social security scheme in Tanzania, a case study of NSSF headquarters whereby the objective of this study is to assess the impact of training and development on employees performance, to identify the contribution of training and deveoping employees in their working areas as well as to find out other people-management activities that impact on perfomance apart from training and development in working places. The evaluation was done to determine investigate the impact of training and development on employees performance in their working place at NSSF headquarters whereby the respondents who were NSSF workers responded. The research is based on a questionnaire where 65 respondents are taken as sample size. Each variable employee performance and Training and development whereas, the data was tested on SPSS to analyze the relationship between two variables and Descriptive Statistics were used to evaluate the results of respondents. The results of the study analysis signify that there is a positive and significant relationship between training and development and employee performance in context of NSSF employees. The study emphasizes on a transparent process for employee performance evaluation. Also, the training and development process should be quantitative and effective. It was concluded that, management activities that have impact on training and development; trainings are important as it influence employees‟ performance other than any other type of motivation. In this perspective, leaders of organizations particulary the case study organiations must employ several strategies to influence more training to employees.