Although Aslam had started his career at the club as a defender, it was Abdur Rahim, the shrewd coach of Victoria, who saw a striker's potential in him, and changed his position in 1979.
[10] Aslam reached the zenith of his career while playing for Dhaka Abahani, as from 1984 until 1987 he was First Division League's top goal scorer for a record four consecutive seasons.
During this time, he had Kazi Salahuddin, Samrat Hossain Emily, PremLal, and Karim Allawi as his striker partners at different stages.
Abahani trailed 3-4 before Aslam levelled the score by dribbling past three of Mohammedan's defenders and curling a right-footed shot into the net.
In the first match, Abahani won 1–0 against Kerala club champions Travancore Titanium, Aslam scored in the 80th minute of the game, receiving Ranjit Saha's ball with his chest and beating the goalkeeper with a sharp volley.
In the double league semi-final against Goa champions MRF in the 32nd minute, Kazi Kamal's free kick inside the opposition box was maneuvered by Aslam, who scored with a header.
[12] During Abahani's 1991 BTC Club Cup triumph, they managed to defeat Indian giant Kolkata Mohammedan in the group stage, with Aslam scoring one of the two goals in a 2–1 win.
In the semi-final they defeated another Indian team in East Bengal Club, with goals from Aslam and Rizvi Karim Rumi.
[1] He also played for East Bengal in the Calcutta Football League in 1991, but failed to make a significant impact due to a head injury he suffered against George Telegraph SC in the 1991 Durand Cup.
In 1994, Abahani defeated Kolkata Mohammedan in the finals of India's Charms Cup, where Aslam and Munna guided a new generation of talents through the tournament.
[1][4] Aslam was part of the Bangladesh U-19 team at the 1978 AFC Youth Championship, which was the first-ever international football tournament held in Dhaka in 1978.
Salam Murshedy was his striker partner, while other members of the team included Lal Mohammad (GK), Alo, Azmat Ali, Sawpan Das, Imtiaz Sultan Johnny, Hassanuzzamn Bablu, Ashish Bhadra, Anwar, Gaffar, Wasim Iqbal, and Mossabbir, most of whom later went on to accompany Aslam in the senior national team.
In 1979, he played against Sri Lanka as the youngest player on the national team during the 9th Korea Cup football held in Seoul.
[1] Aslam was one of the youngest players on the Bangladesh squad during the 1980 AFC Asian Cup in Kuwait, which was the country's first time participating in Asia's biggest football tournament after qualifying with their first attempt.
He was an integral part of the Bangladesh Red team during the 1983 President's Gold Cup, scoring once apiece against South Korea XI and Nepal.
The subsequent year, a star-studded Bangladesh team took part in the 1985 South Asian Games on the hunt for their first international trophy.
[18] India's goalkeeper during the game, Atanu Bhattacharya, later told Aslam during his time at East Bengal, "Dada, you have ended my career!
Nonetheless, Bangladesh failed to make it a memorable draw, as Rumman Wali Sabbir missed a crucial penalty towards the end of the game.
[20] During the 1989 President's Gold Cup final, Aslam scored the equalizer against Korea University as the game ended 1–1, with Bangladesh winning the title on penalties.
[21] Aslam was left out of the Bangladesh squad by Iranian coach Nasser Hejazi for the 1989 South Asian Games, a decision which was criticized by both media and fans.