Factory worker. A factory worker is someone who performs various jobs as part of the production process in a factory setting. They are usually responsible for operating machinery, assembling goods, packing and labeling products, and performing other tasks to keep the production line running smoothly. Factory workers may also be responsible for inspecting products to ensure quality control standards are met. Factory workers need to have good manual dexterity and physical strength, as well as the ability to work quickly and accurately under pressure.