Doctoral Program Requirements

The PhD is our primary doctoral program. The Doctor of Engineering Science (DES) variant of the doctorate has identical academic requirements to the PhD program. (The “distance learning” Doctor of Engineering Science (CVN-DES) variant of the doctorate omits Teaching/TAing and Community Service.) There are some differences in registration and maximum time to degree for PhD vs. DES, and DES students may be part-time whereas all PhD students must be full-time.The DES is awarded by SEAS whereas the PhD is awarded by GSAS. For presentation purposes, the doctoral program requirements are divided into general requirements that are applicable throughout the program and milestones that must be fulfilled by certain points during the program.  Except where specified, all doctoral requirements apply to both PhD and DES.



The primary focus of the doctoral program is research, with the philosophy that students learn best by doing – beginning as apprentices and becoming junior colleagues working with faculty on scholarly research projects. All doctoral students spend at least half-time effort on research under the direction of their advisor(s). PhD students are expected to participate in departmental and laboratory activities full-time on-campus throughout the program, except possibly for summer internships elsewhere. Study for the MPhil, a GSAS prerequisite for the PhD, is full-time only.  The department rarely considers the admission of part-time students (i.e., DES students).


Every doctoral student must have an advisor throughout the program.  Most PhD students arrange a research advisor (who will in most cases later become the thesis advisor) during the admissions process prior to enrollment, and work closely with him or her on directed research from their first day in the program. A few PhD students are assigned only a nominal departmental advisor initially, and then arrange a research advisor during their first year, normally by the end of their first semester. DES students must arrange an advisor prior to admission to the program. Some doctoral students have two or more joint advisors.


The Department of Computer Science takes pride in maintaining a well-developed sense of community, and sees as an essential part of its doctoral program the preparation of its students for this important aspect of their future careers.  It therefore strongly encourages doctoral students to contribute a year of service to the department’s professional, operational, or social needs, preferably during their first two years in the program. A list of community service positions normally held by doctoral students is available in mice. (CVN-DES students are not expected to contribute community service.)


All coursework must be completed by the end of the fifth semester. Completion of the Analysis of Algorithms prerequisite together with all four distribution courses constitutes completion of “the qualifier”.


The minimum passing grade for MS/PhD, PhD and DES students in all courses, including imported and previously completed Columbia courses, is B+. The average grade across all courses must be A- or higher.


Analysis of Algorithms is the core of Computer Science, which unites the many disparate sub-fields.  All doctoral students are expected to complete an acceptable lecture course (graduate or upper-level undergraduate) in Analysis of Algorithms, with grade B+ or higher, prior to entering the program.  Students who have not already satisfied the Analysis of Algorithms prerequisite prior to enrollment must take COMS W4231 at Columbia by the end of the first year in the program.


While the directed and thesis research provides depth, it is also important to ensure breadth across the many sub-fields of Computer Science. The distribution requirement tasks doctoral students to complete a total of four graduate lecture courses, including at least one from the approved lists for each of the Artificial Intelligence and Applications, Systems, and Theory areas, and the fourth from any of these approved lists. Every doctoral student must also complete six elective topics approved by the advisor. Some or all of the electives may be waived on the basis of courses recently taken elsewhere, but the entire distribution requirement must be fulfilled at Columbia. (Course waiver does not grant degree credit, so students must substitute another course towards the degree credit requirement.)


Success as a Computer Scientist depends not only on the ability to generate and explore new ideas but also on the ability to communicate those ideas effectively. For this reason, all doctoral students are expected to develop and exercise presentation and teaching skills as part of their education.  Doctoral students are required to fulfill two “teaching units”, which may involve a combination of teaching assistant and/or instructor positions. The teaching requirement is normally completed by the end of the sixth semester. (CVN-DES students are exempted from the teaching/TAing requirement.)


The candidacy exam is an oral exam based on a syllabus prepared jointly by the student and his/her candidacy committee. Admission to candidacy (passing the exam) certifies that the doctoral student has demonstrated a depth of scholarship in the literature and the methods of the student’s chosen area of research, and has demonstrated a facility with the scholarly skills of critical evaluation and verbal expression. The candidacy exam should be completed by the end of the sixth semester, and must be completed prior to the thesis proposal.


The degree of Master of Philosophy is conferred by GSAS upon a PhD student who has fulfilled satisfactorily all PhD milestones except the proposal and dissertation (i.e., prerequisites, breadth, teaching, candidacy). The MPhil also requires completion of six Residence Units and a total of 60 graduate units beyond the undergraduate degree (including the 2 RUs and 30 units of advanced standing obtained after completing the MS degree). All work for the degree must be completed within three years beyond first enrolling in GSAS (or four years counting any time enrolled in SEAS). See the GSAS requirements for the MPhil.


In the thesis proposal, the doctoral student lays out an intended course of research for the dissertation.  By accepting the thesis proposal, the faculty agrees that the proposal is practicable and acceptable, that its plan and prospectus are satisfactory, and that the candidate is competent in the knowledge and techniques required, and formally recommends that the candidate proceed.  The formation of the dissertation proposal committee is specified here. The proposal must be completed by the end of the eighth semester.


The doctoral dissertation and defense is typically completed during the fifth or sixth year in the program. Some very highly motivated students, particularly in theoretical areas, may finish in less time. GSAS imposes a maximum time-to-degree limit for PhD students. SEAS imposes a maximum limit for DES students, which may be different. Excruciatingly detailed rules and regulations, including formation of the dissertation committee, handling of remote participants in the defense, and filling out the numerous forms, are available from the Dissertation Office. A latex template for the dissertation is here. Some defense hints can be found here.

The Application for the Dissertation Defense should be submitted by the department as soon as the five committee members have been finalized, even when the defense has not yet been scheduled.  This form must be received from the department at least four weeks before a defense takes place. Failure to adhere to this policy may result in the defense application being rejected. Dates and deadlines for the defense and deposit can be found here.




Last updated on December 4, 2018.