Spirit AeroSystems | 161,821 followers on LinkedIn. Designing and manufacturing innovation for commercial, defense and business aviation. | Inventing, designing and building what’s best in aerospace. Spirit AeroSystems is one of the world’s largest manufacturers of aerostructures for commercial airplanes, defense platforms, and business/regional jets. With expertise in aluminum and advanced composite manufacturing solutions, the company’s core products include fuselages, integrated wings and wing components, pylons, and nacelles.