Cillian Reardon turned pro in March 2018, following an amateur career in Ireland.

A full time performance coach for the successful Leinster Rugby team, Reardon saw his team achieve a European and Domestic double in 2018.

Training with Steve O Rourke in St. Michael’s gym, Reardon signed with Assassin Boxing in April 2018, and defeated Sean Gorman in York Hall later that month.