Master of Science in Environmental Science (MSES)

Earn an MSES degree and shape the future of environmental science

With a Master of Science in Environmental Science (MSES) degree from the O’Neill School, you’ll become an environmental professional—mastering the science, along with the analytical and policy skills needed to apply scientific knowledge and lead the way toward solving environmental issues facing our global society. Our MSES program is one of the oldest and largest in the nation.

Learn from the best

Our faculty members are top research scientists, serious scholars, and dedicated educators, advisors, and mentors. They earn accolades—from National Science Foundation awards to Fulbright fellowships to the Nobel Prize. As a student at O’Neill, you’ll benefit from their expertise and work alongside them in a collaborative environment.

Consider a dual degree

Get more education in less time with a dual MSES-MPA degree—earning two master’s degrees in less time than it would take to earn each degree separately. By combining your MSES with an MPA degree, you further expand your career potential.

Take the first step

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The MSES Program

2years to complete

48credit hours

Core Curriculum

Master the fundamentals with courses in Applied Math for Environmental Science, Statistics for Environmental Science, Statistics for Environmental Science, Applied Ecology, Environmental Engineering, and Environmental Chemistry. You’ll also choose from courses in environmental policy, management, law, and economics.


You’ll choose at least one specialized area of concentration, focusing on your area—or areas—of interest.

Experiential Requirement

You’ll complete an internship, reserch project, or other professional volunteer experience.

Capstone Project

You’ll complete a semester-long group project working on a complex problem, often for a real-world client.

50 years at O'Neill