3rd Brigade currently consists of the following units:
- 3rd Brigade Headquarters
- 4th Regiment, Royal Australian Artillery
- 3rd Combat Engineer Regiment
- 3rd Combat Signal Regiment
- 1st Battalion, Royal Australian Regiment
- 3rd Battalion, Royal Australian Regiment
- 3rd Combat Service Support Battalion.
Soldiers from 3rd Brigade in recent years have deployed on warfare, peacekeeping and humanitarian assistance operations in Afghanistan, Fiji, Iraq, Timor-Leste (East Timor), Solomon Islands, Tonga and Vanuatu.
In addition to operations, 3rd Brigade is actively involved in a range of other activities that serve to enhance its capability, including international engagement activities such as undertaking training with the Malaysian military as part of Rifle Company Butterworth and exchanges with the United States Army and United States Marine Corps.
3rd Brigade is a unique formation with many skills that are not held elsewhere within Army. As a multi-role brigade, 3rd Brigade excels in rapid response and manoeuvre. 3rd Brigade units can move strategically and tactically by a range of means: amphibious ships and fixed-wing and rotary-wing aircraft (including C-17, C-130, MRH-90 and CH-47).
3rd Brigade specialises in seizing a point of disembarkation, establishing forward operating bases and maintaining them until heavier forces arrive.
3rd Brigade have implimented initiative to support Defence Families in north Queensland called Geckos.