The median annual wage of fire inspectors and investigators was $52,230 in May 2010. The median wage is the wage at which half the workers in an occupation earned more than that amount and half earned less. The lowest 10 percent earned less than $34,210, and the top 10 percent earned more than $85,260.
Most fire inspectors and investigators work in shifts. Although the length of the shift may vary, 24 hour shifts are common. Inspectors and investigators often work evenings, weekends, and holidays.
Source: Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2012-13 Edition