His current position is the Assistant Secretary-General for Humanitarian Affairs at the Organisation of Islamic Cooperation (OIC).
His previous position was chief of staff to the Secretary-General of the Arab League.
Youssef's career as a diplomat began when in 1985 he joined the Egyptian Ministry of Foreign Affairs of Egypt.
He joined the Arab League as an official spokesman in 2001.
Youssef holds a Bachelor of Science in Physics from Cairo University, a Master's degree in Liberal Arts from St. John's College, New Mexico, and a Master's degree in Economics from the American University in Cairo.