Students planning careers in Environmental Science should major in either Biology or Chemistry and develop a course selection carefully designed to assist in meeting career goals. A minor in chemistry or biology, as appropriate for the major, is also recommended. Because Environmental Science is an applied field, students are strongly encouraged to include in their programs an internship or practicum at one of the institutions with which Maryville College maintains a research arrangement.

Students are also encouraged to examine the very differently focused Major in Environmental Studies, a major based in the social sciences and serving a variety of careers related to environmental policy and management.