Following his performance at the 1953 season of the National Football Championship for Pakistan Air Force held in Peshawar, he was selected for the Pakistan national team at the 1953 Asian Quadrangular Football Tournament held in Rangoon, Burma.

[2][3] Singapore Standard described him as "Malaya's loss and Pakistan gain" due to the former losing a key player of Selangor.

[4] Later on in 1963, he was appointed captain to lead the national team at the 1964 Summer Olympics qualification against Iran in both legs.

[5] In 1967, Amin was appointed as head coach of the Pakistan national team for the 1968 AFC Asian Cup qualification.

[6] In his last year in 1973, he coached in a friendly tour of the Pakistan national team to China, Hong Kong and North Korea which included several test matches against local clubs and a friendly against the China national team.