A professional who tends equipment that cooks corn in steam cooking vat or kettle to soften corn preparatory to grinding into products, such as masa (cornmeal dough), for use in making corn chips and tortillas. Respnsibilities include:

• Dumps prescribed quantities of ingredients, such as shelled corn, water, and lime, into cooking vat, and sets controls to admit steam into jacket of vat.
• Adjusts cooking temperature and starts equipment that automatically cooks and stirs ingredients.
• Drains corn into tank of water, after specified cooking time, for cooling and soaking preparatory to hulling and grinding by corn grinder.