He was a member of the SSG of the army, an intelligence officer of the ISI and served as Pakistani Consul General in Herat, Afghanistan.

[4] A veteran of the Soviet–Afghan War, he is widely believed to have played a key role in the formation of the Taliban, after having helped train the Afghan Mujahidin on behalf of the United States in the 1980s.

Upon his graduation from the Special Forces School, Amir Sultan Tarar was awarded the American Green beret by his training commander.

After the dissolution of the Soviet Union, Amir Sultan Tarar was invited to the White House by the then President George Herbert Walker Bush, and was given a piece of the Berlin Wall with a brass plaque inscribed: "To the one who dealt the first blow.

He also claimed that, when he presented operational details to Aslam Baig after General Zia's death about anti-soviet struggle, the later was surprised as to the extent.

In Cathey Schofield's book Inside Pakistan Army, Colonel Imam admitted meeting Osama Bin Laden in 1986.

Khawaja's body was found near a stream in Karam Kot in April 2010 with a note attached saying he was with the CIA and ISI, about seven kilometres south of North Waziristan's main town of Mirali.