After graduating from high school, Ahmad entered the Medical Faculty of Kabul University.

On August 5, 1979, a united front of Anti Khalqist Marxists and moderate Islamist attempted a uprising in southern Kabul.

The uprising lasted 5 hours and was brutally crushed by the Khalqist government's MiG aircraft, artillery and tanks[4][5] During the onset of the Soviet intervention in Afghanistan, Faiz Ahmad, instrumental in the reorganization of the Afghanistan Liberation Organization, set the slogan "All resources at the service of liberation fronts!"

During this time and under Faiz's leadership, the ALO decided to join the Islamist political forces in forming united fronts against the Soviet Union and the PDPA-Parcham government.

Ahmad was assassinated along with six other ALO members by Gulbuddin Hekmatyar's Hezb-i-Islami on 12 November 1986 in Peshawar, Pakistan.