The capacity to deploy human capital in the manufacturing sector in Nigeria has been limited by ethnicity which seems to have affected their service delivery due to their inability to utilize and implement ethnic diversity. The general objective of the study was to examine workforce diversity and performance of Nigerian Breweries Plc, Enugu, while the study specifically ascertained the relationship existing between ethnic diversity and service delivery of Nigerian Breweries Plc, Enugu. The study adopted descriptive survey design. The study has a population of 474 employees. Taro Yamane’s formula was used to determine the sample size of 217 employees. The data obtained from the questionnaire were analyzed using Pearson Product-Moment Correlation Coefficient on SPSS ver. 22. The study found out that there was a strong, positive relationship between ethnic diversity and the service delivery of Nigerian Breweries Plc, Enugu. It was recommended that the Nigerian Breweries Plc, Enugu should integrate diversity management into its management structure to ensure that organisational service delivery is enhanced through ethnic diversity
Keywords: : Human Capital, And Ethnic Diversity., Service delivery, Workforce diversity