mamunul played in the first season of indian super league for atlético de kolkata, he went to the club on a 3 months loan from sheikh jamal dhanmondi club. he is the only south asian player outside india who played in the first season of the league. he impressed indian football fans in 2014 ifa shield by taking sheikh jamal dhanmondi club(one of three foreign clubs participating in the tournament) to the finals. sheikh jamal dhanmondi club received multiple offers for his transfer from indian clubs. but mamunul didn't get any chance to play in "isl".