The main aim of the study was to examine the effect of procurement management practice on operational performance in case of Abay Basin Development Office. Both descriptive and explanatory research design was used. 115 are sample of the study from whole members staff of the organizations by censuses techniques, close ended questionnaire was used for the purpose of collecting the requirement data associated to the study from Abay basin development office management and employees. In order to analyze, interpret and present the data captured via questioner, statistical package for the social science (spss) version 26 was used. The collected data was analyzed using both descriptive statistics and inferential statistics (multiple linear regression). The main findings of the study were, from the dimensions of procurement management practice Supplier selection, Supplier relationship and Contract management had significant effect on operational performance of the Abay basin development office while organization structure has no significant effect on operational performance.