ABSTRACT x Discipline and control are essential management principles that could be used as tools to enhance staff compliance to work standard, rules and regulations in order to achieve organizational goals. Recent studies on the causes of inefficiency, laxity and eye-service among Nigerian employees in the public organizations have been due to lack of discipline and control. Hence, the study investigated the impact of staff discipline and control in an organization with particular reference to Enugu State University of Science and Technology (ESUT). The survey design methods were adopted in the study. Both the primary and secondary data would serve as sources of information. Stratified random sampling procedures were used to select the departments that were included from each of the faculties in Enugu State University of Science and Technology. Tables, simple percentages and five point Likert scale were used in the analysis. The chi-square at the appropriate level of confidence (0.05) was used for the research hypotheses. The sample size was drawn from both the academic and non-academic staff of the University. The findings from the study, Staff discipline to large extent impacted on employees’ performance. It brought about workers punctuality to offices, and made workers to stay in their offices during working hours, promoted service delivery and created successful goals achievement in ESUT through the disciplinary committees set by the University. We also found out that despite, political interference hindered some employees’ performance that affected some of the goals of the institution, and promoted corruption, favouritism and staff misconduct. We also found out that Staff control enhanced discipline in an organization (ESUT) and helped in goals achievement. We found out that Staff control and discipline done more good than harm in an organization including ESUT Staff and its environment. And we recommend that organization to excel, they must write out laws; offences and disciplinary measures guide the organizational activities to attain their goal.