It has a ranking structure which is similar to the military, in that, its senior officers are considered to be in the First Division; roughly equal to that of the Commissioned Officers of the Military. The ranks which make up this division start at Assistant Superintendent of Prisons and go all the way up to Commissioner of Prisons. The Second Division officers are all the officers below this rank; roughly equal to the Other Ranks of the Military. Like the military, orders are given by senior staff and expected to be followed by junior staff.
The Trinidad and Tobago Prison Service is currently headed by the Commissioner of Prisons with the assistance from his three Deputy Commissioners. The Commissioner is answerable to the Minister of National Security. Each of the Deputy Commissioners is responsible for overseeing one of three streams under which over thirty-five other departments and units fall under, with a few exceptions.