Workplace-disruptive behavior is an important public and organizational health issue that calls for public discourse. The high rates in Nigeria and its associated career illogical assumptions among teachers brought about this study to investigate the impact of rational emotive occupational health coaching (REOHC) on irrational career beliefs and workplace deviant behaviors in a sample of Nigerian primary school teachers. A sample of 128 primary school teachers in Nigeria was recruited as participants. They were assigned to REOHC and control groups. Work deviance behavior scale and teacher irrational belief scale were used to assess the participants at 3 points. A pretest-post-test and follow-up design was used in this study. The findings indicated that the REOHC program significantly reduced work-deviant behaviors and irrational career beliefs among primary school teachers. The outcome also demonstrates the connection between groups and gender. This study concluded that primary school teachers' work-related deviant behaviors and illogical beliefs were reduced as a result of the REOHC treatment. Therefore, occupational therapists should help teachers with deviant behaviors and irrational beliefs to change using rational emotive behavioral techniques.