By service type, the global engineering services in airlines market has been classified as new product development, design support, software engineering, process engineering, and Maintenance, Repair, and Overhaul (MRO). The design support segment dominated the market with a valuation of USD 551.8 million in 2018 and reach USD 788.9 million by 2030. Aerospace engineering service providers assist aircraft manufacturers in designing the prototype of aircraft. Various airline companies are outsourcing their design support work to companies such as Triumph Group, Inc. to experience enhanced design quality and structure. The maintenance, repair, and overhaul (MRO) segment is expected to exhibit a CAGR of 4.64% during the forecast period.