The CHMM is a multidisciplinary credential. Management of hazardous materials intersects and cuts across the fields of engineering, geology, safety and industrial hygiene. It also encompasses facets of public health, transportation, homeland security, and other fields as well. The CHMM does not attempt to replace these other credentials. Rather, adding the CHMM to your list of accomplishments shows that you have the knowledge and skills to recognize and resolve hazardous materials issues wherever they occur.