This paper investigated the relationship between discipline as a management tool and academic staff job performance in Cross River State University of Technology (CRUTECH). The study adopted a survey-descriptive case study design because the events had taken place in their natural course of happening. One research question and one null hypothesis were formulated to guide the study. Eight hundred and twenty two (822) academic staff of CRUTECH constituted the population out of which stratified proportionate random samples of fifty (50) academic staff were identified for administration of Discipline as Management Tool and Effective Job Performance Rating Scale (DMTEJPRS) was administered for data gathering. The data were subsequently analyzed with basic statistics and the Spearman’s Rank Order coefficient of correlation to establish the relationship between the variables. Results showed R of 0.49 and coefficient of determination of 24%. Both X and Y variables were regressed and a regression coefficient of 0.71 was obtained. It was concluded that discipline as a management and academic staff job performance had a moderate but significant relationship. Three recommendations were made one of which was that the Management of CRUTECH should utilize discipline as a management tool as argued in this paper and play down the “carrot with stick” philosophy of management generally wielded in organizations.