A line worker performs assembly tasks in a production line to construct products for use in the aerospace, automotive, medical, or manufacturing industries. As a line worker, your job duties include standing for long periods of time at an assembly line, working on repetitive tasks, rotating tasks with other line workers, and providing feedback to production managers about possible improvements for the production line process. To be a line worker, you need physical strength and stamina, the ability to use industry tools, data entry skills, and, for some jobs, experience with computer-aided design (CAD) software.