Private Shane Kearney, who was injured in an attack on UNIFIL troops in Lebanon last week, is on his way back to Ireland from Beirut.
The 22-year-old is being medically evacuated and will arrive at Casement Aerodrome in Baldonnel later on Wednesday.
He will be taken to by ambulance to Dublin's Beaumont Hospital to continue receiving medical treatment.
According to the Defence Forces, Private Kearney is continuing to improve and he remains in a stable condition.
Private Kearney - a native of Killeagh, Co Cork - joined the Defence Forces in October 2018.
He has previously served overseas with the 117 Infantry Battalion UNIFIL.
Private Sean Rooney died when their convoy came under gun attack as they were travelling to Beirut Airport last Wednesday.
Private Rooney is to be laid to rest on Thursday.
The removal of his remains will take place at 8.30am for 9.00am mass at the Holy Family Church in Dundalk.
This will be followed by a burial service at All Saints Catholic Church in Colehill, Co Donegal.
He will be buried with full military honours.
The incident in Lebanon remains under investigation by Irish authorities, UNIFIL and the Lebanese Armed Forces.
Ireland has lost 48 soldiers serving for peace in UNIFIL, the most of any contingent.
Additional reporting: Alan Cantwell