While studying in Motijheel Ideal High School, Mohsin got a chance to practice with Dhaka Second Division club Railway Blues at the Shahjahanpur ground in his neighbourhood. He caught the eye of Abahani Krira Chakra captain Ashrafuddin Ahmed Chunnu during the Sher-e-Bangla Cup, and joined the First Division club in 1979. As he was the third choice keeper at Abahani, he moved to their rivals Mohammedan SC in 1982, for more game time. Mohsin replaced Lal Mohammed as the club's first choice keeper, after the veteran abruptly left football. He made a name for himself that year during the Dhaka Derby when he saved a penalty kick from Kazi Salahuddin.[4] He ended his career in 1995 while playing for Muktijoddha Sangsad KC, after suffering from a long-term knee injury.[5][6]
International career
Mohsin made his international debut against China during the 1982 Asian Games, replacing an out of favour Abdul Motaleb in the starting XI.[7] During the same tournament he made crucial saves as Bangladesh defeated Malaysia 2–1, to earn their first ever victory at the Asian Games. In the 1983 Merdeka Cup he saved a penalty kick against Algeria, in addition to that, he saved penalties against both Iran and UAE during his decade-long career with Bangladesh.[3] He was the first choice keeper for Bangladesh during the 1986 FIFA World Cup qualifiers and the 1985 South Asian Games.
In 1995, Mohsin suffered a serious knee injury and had to travel to Canada to get better treatment, however, the injury did not get better and in 1997, he moved abroad permanently with his family. In 2023, a few years after his return to Bangladesh, his younger brother Kohinoor Islam, announced that Mohsin was not able to get treatment for his Dementia due to financial issues.[13][2] It was also reported that he suffered from mental health problems after losing most of his assets and fortune, following his divorce.[14] On 6 June 2023, Bangladesh Cricket Board announced that they would help fund Mohsin's treatment and also resolve his property crisis.[15][16][17] Following this, Kazi Salahuddin, a former teammate and the president of the Bangladesh Football Federation, stated that he would provide TK 1 lakh to the ailing goalkeeper and would also pay for his treatment costs.[18][19][20] On 7 June 2023, Mohsin was admitted to the Bangabandhu Sheikh Mujib Medical University to get treatment for his illness.[21]