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 was often part of several underage Irish national teams, including those for U16 to U20. He participated in the U16 European championships in Israel and achieved a third place in the U19 European Championships in Norway.