The Defence Intelligence Officers’ Course (DIOC) is a comprehensive course which runs for 3 months. It is an upgrading course for the Basic Intelligence Officers’ Course (BIOC) qualified staff. It prepares officers for early mid-career challenges in the intelligence and security field. Those to attend should be Grade Levels 9 & 10 officers. This is without prejudice to the exigency of nominating officers on higher grade levels. For military personnel, the course is open to officers of the rank of Capt/Maj and equivalent.