This study investigates the combined predictive role of Organizational Climate and Job Burnout on Workplace Deviant Behavior (WDB) within the under-researched context of the Nigerian para-military sector. Addressing a significant gap in the literature regarding the antecedents of misconduct among security personnel, the research employed a correlational design using data collected from 300 officers of the Civil Defense Corps in Oyo State, Nigeria. Standardized instruments (OCM, MBI, and WDM) were used, and data were analyzed via Pearson Product Moment Correlation and Multiple Regression. Results confirmed a significant inverse relationship between Organizational Climate and WDB (r = -0.529, p < 0.001) and a significant positive relationship between Job Burnout and WDB (r = 0.481, p < 0.001). The combined model was highly significant (F (2, 297) =75.617, p < 0.001), accounting for 33.7% of the variance in WDB. Furthermore, Organizational Climate emerged as the stronger unique negative predictor (beta = -0.382) compared to Job Burnout (beta = 0.282). The study concludes that the quality of the organizational environment and the level of chronic occupational stress are critical, measurable factors driving misconduct. Structural interventions to foster a positive organizational climate should be prioritized as the primary strategy for WDB mitigation in high-demand security organizations.