He is currently Vice President at AUB and a Professor of Computer Engineering at the Maroun Semaan Faculty of Engineering & Architecture, AUB. He has over 150 publications in internationally refereed journals and conferences and has supervised 80 research projects. He is a registered Chartered Engineer in the Engineering Council, UK, and a registered Chartered Professional Engineer in the National Professional Engineers Register, Australia. He is Fellow of IET (UK), IEAust (Australia) & Senior Member in IEEE (USA).
He received over 30 national/international awards/honors and was invited for inclusion in over 40 international biographies with over 100 citations including Who’s Who in the World, Who’s Who in Science & Engineering, and Outstanding People of the 21st Century, as well as honorary membership on boards of several biographical institutions.
He was seconded by AUB to serve as Founding President and Dean of the College of Engineering at Dhofar University, Oman. Effective October 2006, he was appointed as Vice President for Regional External Programs (REP) at AUB with an annual projects budget of over $20 Million.
Effective June 13, 2011, he was appointed as Minister of the Ministry of Education and Higher Education (MEHE) in the Lebanese Cabinet to take over the largest ministry in Lebanon. MEHE is composed of major directorates and offices including Directorate of Education, Higher Education (HE), Vocational and Technical Education (VTE), Central Administration, Education Center for Research & Development, Education Sector Development Secretariat, etc. MEHE includes 60,000 employees across the country and controls or oversees over 3000 schools, 50 HE institutions, and 450 VTE institutes in both the public and private sectors culminating in over 1.3 million students. Minister Diab managed an annual budget of around $1 Billion. During 2011-14, an unprecedented number of accomplishments were achieved, many of which for the first time in the history of MEHE.