Deacon was called to the bar in 2024. He had previously worked as a solicitor at the Aboriginal and Torres Strait Islander Legal Service, during which time he acted as an advocate in a variety of court settings. Prior to that, he was the Associate to his Honour Justice Philip Morrison on the Queensland Court of Appeal.
Maintaining a broad commercial practice, he is experienced in taxation law, competition and consumer law, industrial and employment law, and contract law disputes.