Process Engineering is the practical application of basic physical and chemical principles for the industrial production of solid, liquid and gaseous substances. Process Engineers work on the plants and processes. They are concerned with physical, chemical and biological steps – they crush, mix, modify, separate and purify raw materials – and thus create new products. They ensure that pills contain enough active ingredients or that the ingredients of yoghurt, lipstick, fuels or building materials are correctly mixed. Their knowledge and competence ensure that production processes are configured in an environmentally-friendly and energyefficient way.