He completed a Bachelor of Commerce and Laws from University of Melbourne and Post Graduate Diploma in Applied Finance and Investment from the Securities Institute of Australia.

[2] In 1994, Dillon was employed as articled clerk at Corrs Chambers Westgarth and then became a commercial solicitor.

[3] In August 2000, Dillon commenced his career at the Australian Football League as its legal counsel.

At the time of his appointment as AFL CEO-elect in May 2023, Dillon was Executive General Manager Football Operations, Legal & Integrity.

[3] Dillon's father John was a lawyer, eighth president of the Victorian Amateur Football League in 1984, and chairman of the Melbourne Racing Club from 2003 to 2005.