Environmental Tectonics Corporation engages in the design, manufacture, and sale of software driven products and services used to recreate and monitor the physiological effects of motion on humans and equipment, and to control, modify, simulate, and measure environmental conditions. The company operates in two segments, Training Services Group (TSG) and Control Systems Group (CSG). The TSG segment offers pilot training and flight simulators, disaster management systems, and entertainment applications. It provides integrated training services to commercial and government military defense agencies; and training devices to government military defense agencies. This segment also offers entertainment products to amusement parks, zoos, and museums; and disaster management simulation training and products to fire and emergency training schools, and state and local governments. The CSG segment offers sterilizers, environmental control devices, and hyperbaric chambers. It offers steam and gas sterilizers to pharmaceutical and medical device manufacturers; environmental testing systems primarily to commercial automobile manufacturers, and heating, ventilation, and air conditioning manufacturers; hyperbaric chambers to the military organizations; and single occupant monoplace chambers to hospitals and clinics. This segment also provides upgrade, maintenance, and repair services, as well as parts. The company sells its products directly, as well as through sales representatives and organizations in the United States and internationally.