As the national energy market operator and planner, AEMO plays an important role in supporting the industry to deliver a more integrated, secure, and cost effective national energy supply. AEMO operates Australia’s largest gas and electricity markets and power systems, including the:
* National Electricity Market (NEM), the interconnected power system in Australia’s eastern and south-eastern seaboard.
* Wholesale Electricity Market (WEM) and power system in Western Australia.

AEMO’s also operates the:
* Victorian Declared Wholesale gas Market (DWGM) and the Victorian gas transmission system.
* Wholesale gas Short Term Trading Market hubs in Adelaide, Sydney and Brisbane.
* Wallumbilla Gas Supply Hub in Queensland.
* National Gas Market Bulletin Board.
* Western Australia Gas Bulletin Board.

With its broad national focus on the future, AEMO’s objectives are to promote efficient investment in and operation of Australia’s electricity and gas services for the long-term interests of consumers with respect to price, quality, safety, reliability and security of energy supply.