Heavy equipment technicians keep diesel and gasoline-powered equipment moving freight, earth and people; pumping water for irrigation; drilling for oil; powering farm tractors; and generating electrical power. They not only diagnose malfunctions and repair engines, they repair and service fuel injection systems, electrical and electronic systems, hydraulic systems, brakes, steering systems and power transmission systems. Estimates suggest less than half of the current demand for technicians in this industry is being met, so skilled graduates are already in high demand.