Having graduated in Architecture from Académie Libanaise des Beaux-Arts (ALBA) in Beirut in 1985, Fadlallah has since been engaged in individual and collaborative practice alongside a number of university teaching positions. He taught modules in History of Architecture and Sketching as well as a Design Studio at ALBA from 1989 to 2000. At American University of Beirut (AUB), he taught the courses History of Architecture, Vertical Design Studio and Regional Surveying. At Universite Saint Joseph (USJ), Fadlallah ran a course entitled L’Histoire des Civilisations. Fadlallah has also generated several publications. He achieved a Special Mention in the 1995 Marble Architectural Award for his Achadia Building 598 in Beirut. Fadlallah co-founded Dagher Hanna & Partners in 1994, and has jointly led its award-winning production since