Ducommun Incorporated provides engineering and manufacturing services for aerospace and defense, industrial, medical, and other industries in the United States. It operates through two segments: Electronic Systems and Structural Systems. The Electronic Systems segment supplies cable assemblies, interconnect systems, printed circuit board assemblies, electronic and electromechanical components, lightning diversion systems, radar enclosures, avionics racks, shipboard communications and control enclosures, wire harnesses, surge suppressors, and engineered products such as illuminated pushbutton switches, microwave and millimeter switches and filters, and motors and resolvers, along with engineering services for aerospace system design, development, integration, and testing. The Structural Systems segment designs and manufactures complex contoured aerostructure components and assemblies, including composite and metal bonded structures, precision profile extrusions, ammunition handling systems, seals, aerodynamic systems, and structural assembly products such as winglets, engine components, fuselage structural panels, wing spoilers, rotor blades, flight control surfaces, and engine nacelle components. The company serves commercial aircraft, military fixed-wing and rotary-wing aircraft, and space programs. Founded in 1849, it is headquartered in Costa Mesa, California.