Fire marshals conduct arson investigations, supervise firefighter team members, check buildings for potential fire hazards, and teach fire safety classes. The U.S. Bureau of Labor Statistics categorizes fire marshals as a type of fire investigator because, in many states, both jobs include authority similar to that possessed by law enforcement officers. Travel to sites is often required for this job, and safety precautions must be followed when checking buildings for fire hazards or while conducting arson investigations. Fire marshals must have physical endurance and strength and be willing to work both day and night shifts.