Being a younger brother of Yar Mohammad Khan he followed his footsteps and joined politics from student life.

[citation needed] He was requested by Sheikh Mujibur Rahman to perform the election in 1973 from the same constituency Dacca from which he won in 1970, but M Sirajul Islam refused by saying the country is now independent and it is under the safe hand of Sheikh Mujibur Rahman, therefore if the country needs him to fight he will get back as long as Bangabandhu wants him.

[citation needed] He was the governor of Lions Bangladesh, founder member of National Medical College Hospital and president of Dhaka Mahanagar Samity.

[6] Sirajul Islam joined Underprivileged Children's Educational Programs (UCEP)-Bangladesh as an associate member in 1990.

[3] In 2005, he was awarded the "Ambassador of Goodwill" by Lions Clubs International in recognition of his services to the less fortunate.