地球与环境科学理学硕士旨在为应用科学以及为环境问题做出关键决策所需的社会，政治和经济方面提供强有力的准备。该程序有两个选项，PSM和地质。专业科学硕士（PSM）包括一个核心课程，其中包括实习，并参与与该实习有关的基础或应用研究项目。为了容纳在职专业人员，如果他们的教职顾问认为合适，可以在他们的营业地点完成实习。该计划的设计目的是使它有可能在两年内完成，并且将尽一切努力为专业人士提供方便的课程。所需的实习计划将在第一年和第二年的夏季提供，并在下个季度提供受指导的研究生学习。由于许多本地公司已表示有兴趣延长实
The Master of Science in Earth and Environmental Sciences (MSEES) program is hosted jointly by CSUSB's Department of Chemistry and Biochemistry and the Department of Geological Sciences. The MSEES program has two degree options: The Professional Science Master's (PSM) option and the Geology option. The PSM option is an applied multidisciplinary program. In addition to courses in chemistry and geology, there are required courses in public ad­ministration, health sciences, geography, and either economics or informa­tion science. Electives are available in these departments as well as biology and management. Students are admitted from numerous backgrounds, but generally with bachelor's degrees in some scientific field such as chemistry, biology, or environmental science. The PSM degree is meant to combine non-science ''professional'' courses with science courses and is considered a terminal, non-thesis degree. In lieu of a thesis, a combination of an internship and project is required for graduation.<br>This program is designed to provide a broad background in sciences relevant to the environment, and is designed so that it can potentially be completed in two years.