Mohammad Abdul Jalil was born at Wazirpur in Barisal District on 9 February 1942. He passed the matriculation examination from Wazirpur WB Union Institution in 1959, IA examination from Murry Young Cadet Institution, and joined the Pakistan army as trainee officer in 1962. He obtained his graduation and M A in History during his service in the army. M. A. Jalil was promoted to the post of Captain in 1965, and was elevated to the position of Major in 1970. In February 1971, Major Jalil came to Barisal on leave from his place of posting in Multan, and joined the war of liberation in March.