[1] He played for Oxford University where he has completed a Masters in African Studies and a DPhil in Politics.
He was admitted to the bar of the High Court of New Zealand in 2006 where he appeared for the Crown in criminal and refugee matters.
[5] In 2003, Mahony drafted recommendations on governance and corruption for the Sierra Leone Truth and Reconciliation Commission.
In 2008, he directed the Witness Evaluation Legacy Project at the Special Court for Sierra Leone.
[7] From 2015 to 2018, Mahony worked for the United Nations Development Programme[8] on Strategic Policy, Conflict Prevention, and Transitional Justice.