AAR Corp. engages in the provision of products and services to commercial aviation and government and defense industries. The company is headquartered in Wood Dale, Illinois and currently employs 5,600 full-time employees. The firm supports commercial and government customers through four operating segments: Parts Supply, Repair & Engineering, Integrated Solutions, and Expeditionary Services. Parts Supply segment primarily consists of its sales of used serviceable material, including aircraft, engine and airframe parts and components and distribution of new parts. Repair & Engineering segment primarily consists of its maintenance, repair, and overhaul (MRO) services across airframes and components. Integrated Solutions segment primarily consists of its fleet management and operations of customer-owned aircraft, customized performance-based supply chain logistics programs and others. Expeditionary Services segment primarily consists of products and services supporting the movement of equipment and personnel by the United States and foreign governments and non-governmental organizations.