At the international level, he represents Jamaica U17. He plays primarily as a Defender.

His most recent move was a from Cedar Stars Academy to New York City FC Academy on 2024-08-01.

Throughout the CONCACAF U17 Championship 2025, Kieran Smith featured in 2 matches, averaging 1 tackles, 1 interceptions, and 2.5 clearances per game, while blocking 0 shots per game.