[7] In 2017 he played for the college team of De La Salle University in the UAAP but struggled to score goals in his first year.
[8] He improved in his second year, scoring three goals, but moved to Enderun Colleges in 2019, where he played for the school's futsal team.
[10] In 2019, he made his professional debut with PFL side Global Makati, though he struggled to find goals as the club finished bottom of the league.
[14][15] However, his stint was cut short in early 2023 when the club withdrew from the league, citing investor issues.
Custodio got his first national team call-up while still playing for La Salle Green Hills, representing the country in the 2015 AFF U19 Championship.