Based on the notion that the Fire-service profession is a strenuous and hazardous occupation, this study explored and identified the hidden characteristics of firefighting tasks, and factors predictive of firefighters’ work-related musculoskeletal disorders in the Ghana Fire Service. Quantitative data was collected from three hundred and six firefighters and analyzed using both factor and correlation analysis. It was found that the firefighters experience several traumas characterized by exposure to human entrapment and loss in fires accidents, and personal terrible sensory experiences, the enormity of which increase with increasing years of firefighting-task performance. The firefighters are also exposed to several WMSDs whose enormity is felt irrespective of years of task performance. It is concluded that the identified hidden aspects of the firefighting-task characteristics provide insights into the enormity of trauma and WMSD associated with the task performance, which could be used to optimize the future design and management of the firefighting-task.