Kearney appeared many times for several of the underage Irish national teams, from U16 to U20. He played in the U16 European championships in Israel and finished 3rd in Norway in the U19 European Championships.
Kearney frequently played for various underage Irish national teams ranging from U16 to U20. He took part in the U16 European championships in Israel and placed third at the U19 European Championships in Norway.