Varied Shifts and Schedules Available The Food Service Technician performs routine duties in the cafeteria such as stocking supplies, setting up food lines, operating the cash register, cooking short-order grill items, and portioning food to customers in order to ensure customer satisfaction. The Food Service Technician performs routine duties in the cafeteria such as stocking supplies, setting up food lines, operating the cash register, cooking short-order grill items, and portioning food to customers in order to ensure customer satisfaction.