He was the Vice-Chancellor of Sudan International University in 1998. He was previously Vice-Chancellor of Khartoum University (1994-1998), Dean of Veterinary Science (1992-1994), Dean of Students (1990-1992), Professor of Animal Physiology (1991), Associate Professor at the same university (1977-1991) and Associate Professor at King Faisal University in Saudi Arabia (1979-1987). He was Vice-Dean of Veterinary Medicine at King Faisal University, Saudi Arabia (1982-1984).
Before that, Prof. El-Hadi spent 15 years at the Department of Physiology and Biochemistry, University of Khartoum, successively occupying the posts of Research Assistant and Lecturer (1964-1977).
Prof. El-Hadi has a number of scientific publications in renowned international journals to his credit. He supervised and examined a number of postgraduates, and refereed the promotion of internal and external candidates for associate and full professorships. He participated in the various administration committees at Khartoum (Sudan) and King Faisal (Saudi Arabia) Universities.
Dr El-Hadi is the Chairman of the Sudan Veterinary Association and member of the Sudan Veterinary Council (1997-to date), Member of the Editorial Board of the Sudan Journal of Animal Production, Member of the World Poultry Science Association, Member of the Euro-Arab Veterinary Association (1997-to date).
He is former Chairman; Sudan National Committee for Dry Land Husbandry, Sudan Association of Universities (1995-1998) and Association of Arab Universities (1995-1997). He was also Board Member of the Association of International Universities (1995-2000).
Prof. El-Hadi is an elected Fellow of the Islamic World Academy of Sciences (1994).