Training and development plays an important role in contributing to project performance. Thernsignificance of improved employee performance and job performance has been acknowledged inrnany organization and this improvement lies on the proper and effective training and development.rnThe purpose of this study is to assess effect of TEP staff training and development in contributingrnto project performance at Ethio telecom. Both primary and secondary data were collected for thernstudy. In order to collect and analysis primary data 132 staffs of core team and 3 key informantrnwere taken. Questionnaires and interviews used as the method of data collection, and the datarncollected, analyzed using descriptive statics, correlation and regression analysis using SPSS. Thernspecific objective of the study were grouped into five major sections that; assessing the objectivernof training and development, training and development need assessment, training and developmentrndelivery method, training and development effectiveness evaluation and training and developmentrneffect on project performance. The study indicated that 90.2% of the respondent was agreed thatrnthe training and development provided were good and relevant to objective of the project. Thernstudy also indicated that 76.5% of the respondent was agreed that the training and developmentrnneeds assessment were conducted by the immediate supervisor in consultation with employee. ThernProject used both on the job and off-the-job training methods as ascertained by 81.8% of thernrespondents. It was also found that the TEP had exercised training and development effectivenessrnevaluation, as agreed by 84.1% of the participants, the training and development effectivenessrnwere evaluated in terms of feedback received from coworkers regarding their job performance.rnThe correlation of the study showed that there is significant positive relationship between three ofrnthe training practice, training objectives, need assessment and evaluation but no relationshiprnbetween training methods implemented and project performance. Recommendation are providedrnon how to build effective training and development programme at ET. Furthermore, it isrnrecommended for future researchers, to include all regional administrative of the company and tornlook the whole staffs including temporary employees by expanding to other graphical areas.