He completed a doctorate in Sorbonne University in International Public Law at the Faculté de Droit et sciences économiques in Paris, France in 1970.

Then from December 1977 to November 1978, Tarzi was Deputy of Department of International Financial & Economic Relations, Ministry of Foreign Affairs, Kabul, Afghanistan.

In 1980, after the Communists had seized power in Afghanistan, Tarzi began working as International Civil Servant Diplomat for Organisation of Islamic Cooperation (OIC).

From November 1992 to January 2000, Tarzi was Ambassador, Permanent Observer of OIC to the United Nations Office and other International Organisations in Geneva.

[2] From January 2007 to September 2010, Tarzi became Ambassador and Permanent Representative of the Islamic Republic of Afghanistan to the United Nations office and other International Organisations based in Geneva.