Mohamed Hag Ali Hag el Hassan OMRI GCONMC FAAS FIAS FTWAS (Arabic: محمد حاج علي حاج الحسن; born 21 November 1947) is a Sudanese-Italian mathematician and physicist who co-founded numerous scientific councils.

[4] Hassan returned to Sudan later became Professor and Dean of the School of Mathematical Sciences, University of Khartoum from 1985 to 1986.

Frustrated by scientific stagnation in Sudan, and at the request of his father, Hassan visited Italy, and was then motivated to re-peruse science again by Nobel Prize laureate, Abdus Salam who was (at time) working at the International Centre for Theoretical Physics (ICTP), Trieste.

[5] Abdus Salam offered Hassan an associate membership at ICTP to provide a conducive environment for research.

[14] Hassan is the co-chair of resident of the InterAcademy Partnership (IAP), and chairman of the Council of the United Nations University (UNU).