In 1995 Bennett became a professor at Bilkent University in Ankara. His areas of expertise are: provincial and military Roman archeology, late Roman and Byzantine architecture in Turkey, the Roman Empire and the Roman army and the study of Late Antique and Medieval architecture. He has published numerous monographs and articles on various aspects of Roman and Medieval Britain and the Roman army, and is the author of two books, Towns in Roman Britain (1980) and Trajan. Optimus Princeps. A Life And Times (1997). The latter has been translated into Romanian and Russian.
