Advance your expertise in ecosystem science and environmental science through the Ph.D. in Ecosystem Sustainability in the Department of Ecosystem Science and Sustainability. Investigate how physical, ecological, and social systems interact, conduct original research, and apply your findings to complex sustainability challenges.
Collaborate across disciplines with researchers, resource users, and decision-makers as you develop the scientific, analytical, and leadership skills to address interconnected social and ecological problems. Prepare to contribute new knowledge and lead sustainability efforts in research, academia, natural resource management, policy, and related fields.

Program highlights
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Become career-ready
Warner College Career Services
Get support with career exploration, job search strategies, resumes and cover letters, interview preparation, and salary negotiation. The career services team also connects students with employers and hosts career events throughout the academic year.
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Gain Hands-on Experience
Natural Resource Ecology Laboratory
Gain hands-on experience through research and community-based projects in Colorado and around the world, through CSU’s renowned Natural Resource Ecology Laboratory and global network of partners.
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find your people
WESS Club
The Watershed-Ecosystem Science and Sustainability Club brings together students who are passionate about sustainability and watershed science. The club offers opportunities for networking, volunteer work, and leadership.
Area of study
Ph.D. in Ecosystem Sustainability
Admissions information
Admission to the Ph.D. program requires support from an approved faculty advisor before applying.
Review Ecosystem Sustainability faculty research areas to identify potential advisors whose expertise matches your interests, then contact them directly to discuss available Ph.D. opportunities.
Once you have secured a faculty advisor, learn how to apply to the program and prepare your application.
Frequently asked questions
How long does it take to complete the degree?
It typically takes three to five years, depending on the nature of the project.
Can I enroll in the Ph.D. program if I don’t have a master’s degree?
Yes, this is possible, but we strongly recommend completing a research-based master’s degree first as this will help you determine whether a Ph.D. is right for you.