Institutions of Higher Education (IHEs) play a central role in global efforts toward environmental sustainability. With 23 campuses, the California State University (CSU) is the largest higher education system in the world. The CSU graduates over 100,000 students annually and significantly contributes to developing the workforce of the state and the country, which underlines the vast opportunity for the CSU system to influence culture change toward sustainability within California and beyond. This qualitative research study focused on CSU campus presidents because previous research has demonstrated the important role IHE leaders play on their campuses by setting a vision, establishing priorities, and allocating funding. This study aimed to investigate the 23 CSU campus presidents' perspectives on sustainability in higher education. The semi-structured interview protocol explored how the presidents understood environmental sustainability, how they viewed the role of IHEs generally and the CSU system in particular in efforts toward sustainability, how they viewed their role as president, and what they perceived as barriers and enhancers to sustainability efforts on campus. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]