The study was about human resource management policies and performance in the public sector. It was based on a case study of Uganda National Bureau of Standards (UNBS). The objectives of the study were: to establish how, human resource recruitment, staff training and development, staff promotion is managed in UNBS. A sample of 80 respondents working in UNBS was used. Qualitative and quantitative methodology was used in the study. The questionnaire, interview, and documentary review were the major tools of data collection. In testing the hypothesized relationship, a number of approaches to data analyses were employed like; descriptive statistics, Pearson product moment, multiple regression analysis, and analysis of variance (ANOVA). Cronbach alpha was used to determine the reliability of instruments. The findings revealed that UNBS has a fair recruitment policy that has enabled the improvement of its performance. It is however evident that inadequate staff training, development programs and lack of promotion affects the performance of staff. Based on the findings of the study, the researcher recommended better recruitment, staff promotion, development and training programs.