He initially studied at Tejgaon Intermediate Technical School before attending BAF Shaheen College Dhaka for athletics, where he caught the eye of football coach Bazlur Rahman, who encouraged him to join Kamal Sporting Club, a Second Division team, in 1974.
In 1979, he joined Mohammedan SC in the First Division on the recommendation of Shamsul Alam Manju, making a single substitute appearance against Brothers Union.
In 1988, he joined newly promoted, Agrani Bank SC as club captain under former Mohammedan coach, Golam Sarwar Tipu.
In the same year, Alok made his final appearances for the national team at the 1985 Quaid-e-Azam International Cup held in Peshawar.
[3] He was also included in the final squad for the 1986 Asian Games held in Seoul, although he failed to make a single appearance in the tournament due to an injury.