This working paper proposes a concept for the Australian Army's Groundbased Aerospace Defence (GBAeD) system of 2030. GBAeD 2030 is part of a balanced joint force, and an integral element of the Australian Defence Force (ADF) air-defence system. It will be able to operate autonomously or as part of a coalition force. GBAeD 2030 will be important to achieving the future military roles, and have utility for tasks that do not require force. Regardless of the operational task, GBAeD 2030 contributes to force protection by analysing aerospace activity, increasing situational awareness and defending key manoeuvre and strategic assets against hostile aerospace threats. These threats will include a range of uninhabited and inhabited aerial vehicles, helicopters, and cruise missiles. GBAeD 2030 will help to counter space surveillance by providing information on space-based information-gathering platforms and advice on countermeasures.