Industry Lists Alabama Aerospace & Aviation Companies 2021 An alphabetical listing of aerospace and aviation companies in Alabama. By Megan Boyle - October 9, 2021 Boeing, Alabama’s largest aerospace company based on number of employees, is actively at work on NASA’s Space Launch System, America’s new rocket for deep space exploration. A lot of Boeing’s work on the SLS has been done in Huntsville. Photo courtesy of Boeing Co./Bob Ferguson Aerospace, aviation, engineering and manufacturing companies in Alabama, listed in alphabetical order. Click here to view the complete listing. The latest Alabama business news delivered to your inbox Sign Up Now!