The objectives of the study were; to identify the level of job performance of employees of financial institutions in Mwanza, region, to find out the extent to which skills management are practiced in financial institutions in Mwanza region in terms of training needs assessment, and employee development programs, to find out the significant relationship between skill management and employee job performance in financial institutions in Mwanza region. The study used descriptive and correlational research design supported by quantitative research approaches. The study used 22 banks and randomly selected149 respondents. The data was collected using a self administered questionnaire and it was analyzed using descriptive statistics. The study found out a high level of job performance of employees in financial institutions in Mwanza Region, a high level of skills management that is practiced in financial institutions in Mwanza Region, and a strong positive relationship between skills management and Employee Job Performance with. The study hypotheses were rejected meaning that there is a significant relationship between employee job performance and skills management practices, training needs assessment and employee job performance. The study concluded that there is a strong positive relationship between skills management and Employee Job Performance. The study recommended that the government should regulate the terms and conditions to the financial institutions on how to handle their workers for them to better their job performance, the financial institutions should continue carrying out skills management practices that is to say training need assessment, employee development programs and rewards since they highly influence employees’ job performance, and other scholars should study more about the influence of skills management on the job performance of employees in other financial institutions, Tanzania. This will help in providing literature and solution to the problems hindering job performance of employees in financial institutions.