ORCA Australia was formally registered in 2016 as the Australia Chapter of Old Rajshahi Cadets Association (ORCA) in Bangladesh. ORCA Australia is registered with the NSW Fair Trading under the Associations Incorporation Act 2009. The organization comprises of the alumni of Rajshahi Cadet Collegewho reside in Australia.

Rajshahi Cadet College is one of the prime higher secondary boarding institutions of Bangladesh.

ORCA Australia (and other chapters e.g., – ORCA and ORCA-USA) is not-for-profit, non-political, volunteer organization. It aims to give-back to the society and conducts various charitable activities to support the poor people in Bangladesh through the member base in Australia, Bangladesh, the USA and in other countries.

Humanitarian activities currently conducted by the organisation are to provide food aid and winter clothing to the poor people, shelter to the orphans, sourcing blood donors for the poor requiring urgent blood transfusion. It organises special fund raising activities in the event of natural disasters in Bangladesh.