He said they invited "the entire Church" to participate in the ordination, including bishops, priests and laity from other rites.
Archbishop Yohanno Petros Moshe, Syriac Catholic Archbishop of Mosul, Kirkuk and Kurdistan, is the seminarians' bishop, and will be the one to ordain them.
Other concelebrants will include bishops from other churches, including the Chaldean and Orthodox churches, he said, adding that in this sense, "it will become a communion around the altar, around Christ."
Fr. Jahola said 90 percent of the Syriac-Catholic faithful in the Erbil diocese are refugees, so seeing the ordination of four young men will give hope to the local Church.
It will also give hope to the universal Church, he said, because "despite the difficulty, there are vocations, youth, who give themselves for the Church, to serve the people of God. This is important in our times."
Sharing his personal feelings on his ordination, Momica said he is both happy for the new step in his vocational life, but also sad that many of his family members won't be able to be there.
"I am very happy to become a deacon, I am so happy! But I am so sad because I am so far away from my town, from my seminary in Qaraqosh, and we lost many people," he said.
The seminarian said that the thought of serving the Church fills him with joy, but that there is also a deep sadness "because there are many people who won't be there at the time of my ordination."
While his immediate family is with him in Erbil, Momica's other relatives left after ISIS began their siege.
The seminarian, who currently works with refugees, said that he would like to stay in Erbil after his ordination so that he can be with his family and other members of his Church.
"I want to stay here in Iraq and I want to know if there is anyone who can help us to stay, to speak with the governments outside to see if they can help us to stay here," he said.
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With the future of Christianity in Iraq uncertain, there are many who want to stay, but don't see a clear solution in sight, he said.
"Our people want to see what the future is here in Iraq for Christians. And...we don't know the future of Christians here in Iraq," Momica said, but added that despite the uncertainty, there are still people who are willing to give it a shot.