Formation 7 CSSB was formed on 1 July 1997 when the
Meeandah-based 7th Brigade Administrative Support Battalion (7 BASB), a Reserve unit that had been formed in 1994, was amalgamated with the Enoggera-based 6th Brigade Administrative Support Battalion (6 BASB), an integrated Regular and Reserve unit that had been formed in 1993. This came about as a result of the decision to disband the
6th Brigade, which resulted in 7th Brigade becoming an integrated Regular and Reserve unit. By 1999, the battalion had an authorised strength of 647 personnel, of which 55 per cent were Reservists.
Operational experience 7 CSSB regularly supports operational deployments in all ADF theatres with individual and small group reinforcements. In late 2003, 7 CSSB supported the
6th Battalion, Royal Australian Regiment (6 RAR)-based "Australian Battalion IX" (AUSBAT 9) deployment to
Timor Leste as part of Operation Citadel. They returned to Brisbane in mid-June 2004. In 2005, elements of the battalion deployed to Iraq as part of
SECDET, which was during
Operation Catalyst. In 2007–08, the 7th Brigade provided the main force elements for the fourth rotation of the Australian
Overwatch Battle Group (West) (OBG(W)-4). Elements of 7 CSSB deployed in support OBG(W)-4, whilst the unit also contributed personnel to the
Australian Army Training Team (AATT). In 2010, elements of the battalion were deployed to
Afghanistan as part of
Operation Slipper. While the majority of the battalion's force was part of the Force Support Unit based in
Tarin Kowt,
Kandahar and
Al Minhad Air Base, elements also deployed in support of the 6 RAR-based 1st Mentoring Task Force (MTF-1) combined arms
battle group that was deployed to
Uruzgan province to conduct
counter-insurgency operations. ==Current role and structure==