O'Neill grew up in Crossmaglen, Co Armagh. He graduated in Communication, Advertising and Marketing at the University of Ulster. He also studied International Business at Wesley College in Delaware, and holds a postgraduate degree in Broadcast Journalism from the University of Sheffield.
O'Neill was a member of the Amateur Irish Kickboxing Squad for five years.
- Eunan O'Neill profile, russiatoday.com; accessed 6 May 2014.