He had previously served as the leader of the Sultan Suleiman Shah Division, a faction within the Syrian National Army supported by Turkey.

[2] He was born in 1987 in the village of Jousa, Hama Governorate, and gained prominence during the Syrian civil war after joining several opposition military groups.

With the onset of the conflict in 2011, he joined an armed opposition group known as "Khat Al-Nar" (Fire Line), which later merged with the "Martyrs of Hiyalin Battalion".

[2][3] Following clashes between opposition factions and Jabhat al-Nusra (laer Hay'at Tahrir al-Sham), al-Jassem relocated to northern Aleppo Governorate and joined the Levant Front.

[4] After the fall of the Assad regime, military opposition factions began to merge within the Syrian Army under the Ministry of Defense of the new administration.