This study focused on examining the effect of motivation on employee engagement in Nigerian Civil Service. The proxies for the motivation were intrinsic motivation and extrinsic motivation. The population of the study was made up of all the civil servants in the six states that make up the South-South zone of the country. Primary data were collected by the administration of copies of questionnaire to a sample size of 600 respondents who were selected using convenience sampling. Five hundred and eleven (511) copies of the questionnaire were completed and returned to the researchers. The data obtained were analysed using descriptive statistics and simple linear regression. Results show that there is significant relationship between intrinsic motivation, extrinsic motivation and employee engagement. Based on the results, it is concluded that there is significant relationship between motivation and employee engagement in Nigerian Civil Service. Consequently, it is recommended, among other things, that government should look into ways of better motivating their employees.