Each UPSC Board is headed by one of the UPSC Members and assisted by four experts (total 5 interviewers) who can be retired civil servants, academicians, scientists and other distinguished persons. These experts are drawn from a large panel of names assembled after careful scrutiny by the UPSC. Usually, 5 to 7 Interview Boards simultaneously conduct the UPSC interviews. Experts are also rotated among these different Boards.
Before the commencement of UPSC Interviews, all the UPSC board members are briefed by Chairman and Members of the UPSC on the purpose and manner of conducting the UPSC Interviews. The Boards are asked to follow some common standards towards maintaining uniformity in assessment.