Abstract: The need to train and develop staff of the Tertiary Institutions in Nigeria is obvious given the growing nature of work environment, the rapid change in the institutions and advancement in technology among other things. Staff training and development helps to ensure that the members of staff of the institution possess the knowledge and skills they need to perform their duties effectively, take on new/additional responsibilities and adapt to changing conditions. Despite the recognition of the relevance of staff training by management experts and government as enshrined in the civil service rules and white papers on various reforms in Nigeria, the experience of staff training and development in the Nigeria Tertiary Institutions has not met the purpose for which it was meant. This paper examines Staff Training and Development with a view to understanding the determinants of effective service delivery in Nigeria Tertiary Institutions. It makes appropriate recommendations on the need to give all staff equal chance of being trained for effective service delivery in the institutions and the development of the country as a whole.