Members are enlisted as ADGs in the Permanent Air Force for an initial period of service of four years; those joining the Ground Defence Reserve Group are employed on full-time service for 11 months, followed by 4 years part-time service. Once a candidate has successfully completed RAAF recruit training they attend the 15-week ADG Basic course at the RAAF Security and Fire School (RAAFSFS) RAAF Amberley, Queensland. Upon completion of trade training ADGs may wear the blue-grey beret which identifies them as a ground defence specialist.