Thermoforming involves using machines to heat plastic and form it into specific shapes. Thermoforming jobs are found in the manufacturing industry. As a thermoforming process engineer, you work to improve plastic production and materials, design machinery, and test various processes. As a thermoforming technician or machine operator, your duties involve setting up a machine to create molded plastic pieces. You operate the equipment during a production run and ensure that the resulting pieces meet quality standards. You also make adjustments during production if necessary. Other responsibilities include performing essential maintenance on the thermoforming machinery.