Studies on the diversity at workplace and its impact on job satisfaction and performance have revealed conflicting results ranging from having positive or negative impact to having no impact at all. The diversity at public enterprises and organizations has been continuously growing due to various reasons, both internal and external. Unlike in private enterprises, however, the diversity in the public sector has been subject to and more exposed to the changes in government policies and regulations. It is generally seen that various age groups within an organization are missing due to long term hiring freezes and increase in women’s participation in economic activities and recruiting high school graduates. This trend results in more complexdiversity landscape in ages, gender, and level of education. This research takes various factors into consideration in analysis and focuses on suggesting effective measures to better manage the growing diversity. This research employed two different methods for measuring diversity. The first method, as used in other studies, is to measure the diversity based on the distribution of employees per diversity type. The second method is making measurement by categorizing diversity in ages, job titles, and education level based on the number of age groups, job titles, and education levels, and the gap between age groups, job titles, and educational levels. The objective research and analysis shows that the diversity in ages has a negative impact on communication while having a positive impact on team creativity, and that the diversity in gender has a positive effect on team communication. The diversity analysis in ages includes the measurement on the number of age groups and the gap between age groups. The analysis shows that the diversity in ages has a comparably larger negative impact on communication and a comparably larger positive impact on creativity as the number of age groups increases within a team. Also, the level of difficulty incommunication increases when there is a missing age groups within a team or organization. The results of this research strongly implies that the vitalizations, competitiveness, and even the performance of individual organization can be positively influenced when the diversity is recognized as a significant factor in organization’s efficiency and effectiveness, and is managed to maximize its positive impact while minimizing the negative.