Boeing projects a $4.9 trillion commercial aviation support and services market from 2026 to 2045, driven by fleet expansion requiring over 2.4 million new aviation professionals globally. The 2026 Pilot & Technician Outlook breaks this demand into 674,000 pilots, 728,000 maintenance technicians, and 1,023,000 cabin crew, with two-thirds of roles replacing retirees and one-third supporting growth. Operators face acute workforce constraints as the global fleet grows nearly 80% to exceed 50,000 airplanes, while passenger traffic doubles and cargo rises 3.7% annually. Digitalization, sustainability mandates, and supply chain capacity limits will reshape aftermarket strategies, forcing airlines to scale hiring, training pipelines, and MRO infrastructure to sustain operations amid rising utilization and new-generation aircraft adoption.