This study focuses on investigating the relationship between the Inspectorate Cadre ranking system and the decline in discipline, professionalism and work performance in the Nigeria Immigration Service (a case study of Osun State Command). The research employed the Likert type questionnaire to collect data from a target audience of one hundred and seventy six (176) officers and men of Osun command. This data was subjected to a quantitative analysis. Also, the formed hypotheses were analysed statistically via the chi square test at 0.05 significance level. Results and Findings reveal a connection between the inspectorate cadre ranking system and the problem of breakdown of discipline, productivity and work performance in the Nigeria Immigration Service. It was therefore recommended that, the dichotomy existing among bachelors (BSC) and diploma (HND) degree holders should be abolished in line with government directives. This way, the career progression of BSC/HND would henceforth be uniform.
Keywords: Discipline, Inspectorate Cadre, Paramilitary, Professionalism, Dichotomy, Public Service