The Office of International Student Services (ISS) is responsible for making the entry of international students into university life much easier, through orientation, island tours, the formation of international clubs and the recognition of independence days of the various nationals at the university. The university recognizes the international dimension to campus life through the integration of the various cultures, and endeavours to value each one represented. The ISS office is located on the top floor of the Administrative Building.

All non-nationals of Trinidad and Tobago are required to obtain a student permit once attending classes at USC's main campus. Such students are expected to take all necessary steps to apply for the student permit, therein complying with the immigration law of the Ministry of National Security of Trinidad and Tobago. Please note that student permits are granted on an annual basis and that student permit application forms should be collected, completed and submitted together with all supporting documents to the Office of International Student Services within the first week of school.

Please note that the university has the right to have a permit cancelled if the student is not registered for classes in any semester. If a student is having any difficulty in registering, the student must visit the Division of Student Services and Enrolment Management to ascertain next steps.