He won an All-Ireland U-14 title with his club and also played on Cork and Munster U-14 and U-15 squads.
Kiely concentrated on Gaelic football after earning selection on the various Cork development squads at underage level.
[1] In 2014 he enjoyed a hugely successful year, winning Munster and All-Ireland titles with Coláiste Choilm, playing for the Cork minor football team, and lining out on the Ballincollig club team that won their first ever Cork SFC title.
[2][3] Kiely's inter-county progression continued and he came on as a substitute when Cork were beaten by Mayo in the 2016 All-Ireland under-21 final.
Kiely also captained University College Cork to the Sigerson Cup title in 2019.