 Due to the specialised nature of the job, officers with the PCG are less likely to transfer to other operational units.Senior Officers in the PCG are, however, usually posted there as part of their cyclical rotation among staff and line units after their mandatory initial posting as Investigation Officers, typically for a short stint of about two to five years.The unit's manpower is supplemented by national servicemen, as well as officers from the Volunteer Special Constabulary.