Chemical engineering is a diverse field that involves various disciplines including petrochemical engineering, pharmaceutical engineering, explosives engineering, environmental engineering, and agrochemicals. Chemical engineers work in a variety of organizations like Shell Corporation, AstraZeneca, and Miracle Grow. They use research from chemists to design and develop useful products. While the number of chemical engineers declined slightly from 2010 to 2018, their average salary ranges from $54,000 to $130,000.