Chemical engineer (excluding petroleum and petrochemical) studies, develops and advises on processes for producing on a commercial scale the chemical or physical transformation of substances, as in the manufacture of chemicals, metals, food products and synthetic materials. He/she designs and develops chemical manufacturing processes and specifies the sequence of physical transformation operations such as heating, mixing, distilling, filtering and chemical processing such as hydrolysis, oxidation, fermentation, electrolysis and polymerisation. He/she develops and implements quality control procedures to inspect and test raw materials and products to ensure compliance with specifications and safety standards.