Environmental Programs

Leading the Way in Environmental Graduate Education

At the O’Neill School, our environmental graduate programs are nationally recognized for their academic excellence, interdisciplinary strength, and real-world impact. We prepare future leaders to tackle today’s most pressing environmental challenges by equipping them with a powerful blend of scientific knowledge, analytical rigor, and policy expertise. Whether you're looking to deepen your scientific understanding, lead sustainability initiatives, or influence environmental policy at the highest levels, our programs offer unmatched opportunities for professional growth and career advancement.

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75% of O’Neill master’s students receive funding packages of at least 25%

Competitive funding packages are available to assist in making our top-ranked school affordable.

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Master of Science in Environmental Science (MSES)

As one of the first, best, and largest programs of its kind in the nation, the on-campus MSES degree provides comprehensive training in environmental science, policy, management, and analysis. Students graduate with the expertise needed to become environmental professionals capable of driving solutions to global challenges. The MSES program emphasizes both scientific mastery and leadership development, ensuring graduates are ready to lead at the intersection of science and policy. Upon completion of this degree, international students will be eligible for the STEM OPT extension.

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Master of Environmental Sustainability (MES)

The MES is an accelerated, 12 month program offered on campus, designed for aspiring sustainability leaders in the public, private, and nonprofit sectors. With a forward-looking curriculum that integrates social, economic, and environmental dimensions of sustainability, MES students gain sought after skills to meet the growing demand for “green” jobs. Upon completion of this degree, international students will be eligible for the STEM OPT extension.

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You are not required to complete the program on campus or in one year — we offer the same cutting-edge curriculum as a self-paced and fully online program. This format allows you to work through the program at your own pace, from anywhere in the world, finishing in as little as two years.

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MPA-MSES Dual Degree Program

Our signature dual degree program combines the scientific depth of the MSES with the top-ranked Master of Public Affairs (MPA) for a dynamic, interdisciplinary education. This powerful combination positions graduates at the vital nexus of science, policy, and management, enabling them to shape environmental outcomes across sectors. By integrating both degrees into a streamlined path, students earn two prestigious credentials in less time than completing them separately. Upon completion of this degree, international students will be eligible for the STEM OPT extension.

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Breadth, depth, and impact

Hear from Environmental Master’s Programs Director Vicky Meretsky, to find the right O’Neill environmental degree for your career.

Description of the video:

The O'Neill environmental programs take advantage of the full range of environmental science and policy faculty in the number one ranked environmental policy and management school in the nation. All of those students can take advantage of the full range of classes in one aspect of their degree program or another. At O'Neill, we're aware of the fact that students come to us with lives, they come to us with passions, and they come to us with budgets. And those are the things that tend to set the degrees apart. For students who need to be out of here quickly or who need to be out of here with as little debt as possible, the Masters of Environmental Sustainability gives students maximum flexibility to interact with policy, management, and science in a one-year time frame and to walk out of here with as much breadth as O'Neill has to offer in your area of interest. MES students tend to go out into things that require them to be able to hit the ground running quickly, knowledgeable about the social science sides of things and things like how grants work, how agencies interact with their stakeholders. If your interests lie primarily in the sciences, the MSES degree will prepare you for a career working in the lab or in the field or working with the public in the sciences, but still savvy enough to understand how policy and law are affecting the science that you're dealing with and the public that's facing it with you. The science degree is going to give students the ability to handle the science and the quantitative aspects of jobs from more purely science perspective than the other two degrees. In terms of overall level of preparation, the MPA-MSES is absolutely our gold standard. You give us two and a half years and we give you two separate credentials that give you breadth and depth on both the policy and the science side. The dual-degree, because of the amount of time that students spend in it, allows students to hit a slightly higher level of job when they go out and arrive, for example, into middle management, but they have the chops to handle that. The O'Neill environmental master's programs are thoroughly committed to preparing students to work in the real world. There is laboratory experience and field experience available in all of the concentrations to ensure that students are not just book learned. Climate change affects the entire world and that means it affects all of the sectors for which we prepare students. Students need to be able to take advantage of the job opportunities out there but also frankly to help solve the problems of the world. Students can work in areas of climate change solutions at the science level as well as at the policy level in municipalities and in agencies and nonprofits around the world. The O'Neill School is unique among programs of its kind in the nation, in that the policy and the science are under a single roof. The faculty work together, they work with students together and the synergy that results from that provides the basis for our number one ranking.

O'Neill provided me with interdisciplinary energy and environmental policy and science training that opened the doors to career opportunities. I apply these skills and knowledge every day. The O'Neill School also enabled me to form relationships with faculty and peers, whom I still collaborate with on research and coalition building.

Devin Hartman, MPA-MSES’10. Director of Energy and Environmental Policy at R Street Institute
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