The week long gathering takes place in Belfast this week.
Mullingar's Aidan Keena is part of the Ireland U21 training camp in Belfast this week.
The Falkirk striker wasn't in Jim Crawford's initial squad but has been called up after a couple of injuries.
The Group A Euro U21 qualifying table toppers next game, is a trip to face 2nd placed Italy next month.
The 21-year-old former Mullingar Athletic man has represented Ireland at every underage level from U17 up to and including two appearances for the U21's during Stephen Kenny's time in charge.