With his growing experience as a diplomat, in October 1976 the foreign office designated him the responsibility of Counsellor at the Permanent Mission of Pakistan to United Nations, New York.

In February 1985, he was sent as Advisor and Chef du Cabinet to the Secretary General of the Organization of Islamic Conference Jeddah, Kingdom of Saudi Arabia where the OIC benefitted from his expertise till November 1988.

The same month, he was called back to Pakistan for more pressing responsibilities as Additional Foreign Secretary, in charge of Multilateral Affairs, Africa, Soviet Union and Eastern Europe and Asia-Pacific.

Due to his excellent advocacy and negotiation skills, he was given the charge of Permanent Representative of Pakistan to the United Nations, from July 1999 till February 2000 in New York.

[6] While serving in this capacity, Inam-ul-Haq’s performance drew the attention of President General Pervez Musharraf who requested he join the cabinet, making him the Minister of State for Foreign Affairs of Pakistan from June to November 2002.