Aim of Inter Services Selection Board is to select potential officers for the defence forces of Pakistan who have the requisite capabilities to successfully complete their course of training at the military academies and also possess physical, mental, social and dynamic qualities to make successful leaders during peace and war.

Inter Services Selection Board caters for selection of candidates for training as potential officers for all the three services of Pakistan. Services Headquarters, however, plan the total number of candidates to be tested/inducted in various courses as per their overall requirement/schedule.
The selection technique followed by the ISSB is three dimensional. All candidates appearing before the ISSB are to take three different types of tests, i.e, psych tests, GTO tests and Interview. The Psychologist Officers, Group Testing Officers and the Deputy Presidents, who are specialists in their respective fields