In 1971, he toured India with the Shadhin Bangla football team in order to raise international awareness about the Bangladesh Liberation War.

[1] In 1973, Nowsher scored the only goal in a friendly match against Singapore, securing Bangladesh their inaugural international football victory.

[3] Born in Munshiganj Sardar, East Bengal, Nowsher's family had originally moved from Chandpur due to his father's job as a lawyer.

The following year, he joined Victoria SC, and guided the team to a fourth-place finish, however, his club career was halted due to the Bangladesh Liberation War, in 1971.

At WAPDA Scottish coach Sandy converted Nowhser, who originally played as a left-winger to a striker and in 1973 he attracted interest from Mohammedan SC.

[6] That season he scored a bicycle kick against his former club Victoria SC and also found the net in a famous 4–0 victory over Abahani Krira Chakra in the Dhaka Derby.

The other scorers in the game were, Md Moin, Hafizuddin Ahmed and Wazed Gazi, while defender Shamsul Alam Manju made headlines for taunting Abahani team leader, Sheikh Kamal.

[4] In 1971, during the Bangladesh Liberation War, Nowsher travelled to Agartala, India, where he met up with Mohammedan teammate Mohamed Kaikobad and his ex-colleague at WAPDA, Enayetur Rahman Khan.

[10] In 1973, Sheikh Shaheb Ali called up eight players from W.A.P.D.A including Nowhser and his brother Sharifuzzaman, to the first Bangladesh national football team, which took part in Malaysia's Merdeka Tournament.

On 13 August 1973, Nowsher scored the only goal against Singapore from a Monwar Hossain Nannu cross, as Bangladesh claimed their first ever win in international football.