Biofuels production workers operate, maintain, and manage facilities that produce useful fuels from plant matter. Biofuels processing technicians measure and load the raw material and additives into chemical-processing equipment. During the process, these workers control valves, pumps, engines, or generators. Technicians record data, collect samples, and monitor quality. As a last stage, they run equipment to extract the biofuels and byproducts. Managers oversee production, maintenance, and safety.