[5] Following his departure, he joined the academy of CD Leganés of Spain's Segunda División.
[6][7] In March 2021 he joined the academy of fellow Madrid-based club Rayo Vallecano of La Liga.
[12] He made his international debut on 14 September 2022, in a 0–4 loss to New Caledonia in the Group stage of the tournament.
[13] Cahill was later called up to the Samoa U23 team for the 2023 OFC Men's Olympic Qualifying Tournament.
[12] As a youth his interests were in the performing arts which led him to auditions for Disney and Broadway.