The ESE graduate program trains doctoral students to solve fundamental problems in environmental science and engineering. The problems cut across traditional disciplinary boundaries and span space scales ranging from global to local. Students are trained to acquire a broad base of knowledge of environmental systems, including the Earth’s atmosphere, oceans, and biosphere. They deepen their knowledge in one or more focus areas, culminating in research leading to a Ph.D. thesis. Reflecting the interdisciplinary nature of research in the ESE program, the program unites faculty from the Divisions of Geological and Planetary Sciences, Engineering and Applied Science, and Chemistry and Chemical Engineering.

Applicants are required to submit the application and supporting materials online prior to the posted deadline. Once the application has been submitted, you will not be able to modify supporting documents, so please proofread your materials thoroughly before submission. To successfully complete the online application process, you must: • Create a free account with CollegeNET to submit the application form online. • Include payment of the application fee or submit a fee waiver request. • Upload a Statement of Purpose. • Request GRE, TOEFL, and/or IELTS test scores to be sent directly to the California Institute of Technology (Institutional Code 4034). • Upload an official electronic copy of your transcripts or online grade reports issued by your college or university. Updated grade reports for terms in progress are not required. Students who have been admitted and plan to attend Caltech will be required to submit an official copy of all transcripts from the Registrar’s Office prior to enrollment. • Register three individuals from whom you will request letters of recommendation. • Upload a CV or Resume.