He worked in the same department until summer 2011. Between 2011 to 2017 he moved to the Faculty of Environmental Designs of King Abdulaziz University, Jeddah, Saudi Arabia. He completed his M.Sc. and Ph.D. in the field of architectural acoustics which is his primary area of interest, in addition to mathematics and its relation with architecture. He has many published researches in national and international scholarly journals in the field of building science, in addition to six published books in the same research area. He also supervised many M.Sc. and Ph.D. thesis in different areas related to architecture. As of fall 2017; he is Professor of architecture and building science in the Department of Architecture, Faculty of Engineering of Ain Shams University.