AAR Corp. engages in the provision of products and services to commercial aviation and government and defense industries. It operates through the following segments: Aviation Services and Expeditionary Services. Read More The Aviation Services segment consists of aftermarket support and services businesses that provide spares and maintenance support for aircraft operated by commercial and government/defense customers. The Expeditionary Services segment involves in delivery of airlift services; and design and manufacture of pallets, shelters, and containers used to support the military's requirements for a mobile and agile force. The company was founded by Ira A. Eichner in 1951 and is headquartered in Wood Dale, IL.