AAR Corp

AAR Corp is a global aviation aftermarket services provider headquartered in the Chicago area and operating in over 20 countries. Founded in 1955, the company employs approximately 8,000 team members and reported annual revenue of $2.8 billion in FY2025. It is the number one aviation maintenance, repair, and overhaul provider in North America, serving commercial airlines, aviation OEMs, and government and defense customers worldwide.

The business runs across four segments: Parts Supply; Repair/Engineering/Software; Government Solutions; and Legacy Commercial Programs. Technical work spans MRO, component repair and engineering, aftermarket parts supply, and aviation software, with proprietary platforms including Trax, Aerostrat, Airvoyant, and Airinmar supporting maintenance planning, fleet management, and repair-cost control. Legacy commercial programs extend support to mature airframe and engine types alongside current-generation fleets.

Roles across the organisation draw on experience in line and base maintenance, component overhaul, engineering, supply chain, and aviation IT. AAR states an emphasis on quality, safety, and ethical business practices, guided by its "Doing It Right®" principle. The company holds Military Friendly® designation and Great Place To Work certification.