Dissertation (MA Public Administration)This study aimed at “Investigation of factors inhibiting implementation of in-service training among TaESA employees”. Cross sectional design was used due to the nature of the study. The study used qualitative and quantitative approaches. A total sample of 60 employees which (60%) of the population was picked from TaESA Dar es Salaam and Dodoma Zones through simple random and purposive sampling methods. Data were collected by questionnaires and interviews. Key findings revealed that, out of six years researcher used as time frame of the study, only two years employees were engaged in in-service training; therefore it indicated that training is inadequate in TaESA. The study also revealed factors that influence in-service training such as; increase of skills, motivation to workers, improved organization performance, low supervision and increased flexibility. Moreover, there are factors that inhibit implementation of in-service training such as; deficit of budget, non involvement of stakeholders, lack of clarity, training needs assessment and a learning culture. In view of the above, the study recommends that TaESA management should make sure it sets aside funds for effective implementation of in-service training to its employees. The Management especially Human resource department should have program to sensitize employees need to have self-initiative towards developing their carriers. Training application procedure should be transparent to all employees at all levels and lastly, the organization should embark on effective training programs in-order to improve equipment reliability and increase production level.