Embraer SA based in Sao Paulo, Brazil, Embraer manufactures regional aircraft, business jets, and defense and security products. The company also offers a range of services to support its installed base of hardware. Its defense and security business is currently focused on developing the KC-390 military transport aircraft. The company also produces aircraft systems and structural components. It operates through the following segments: Commercial Aviation; Defense and Security, Executive Aviation, Service and Support, and Other Segments. The company generates maximum revenue from Commercial Aviation segment.