Ahmad al-Jallad is M.S Sofia Chair in Arabic Studies at the Ohio State University, where he specializes in the early history of Arabic and North Arabian. He has done research on Arabic from the pre-Islamic period based on documentary sources, the Graeco-Arabica (Arabic in Greek transcription from the pre-Islamic period), language classification, North Arabian epigraphy, and historical Semitic linguistics. He has written the first grammar of Safaitic, a corpus of Ancient North Arabian inscriptions from northern Jordan and southern Syria, and is currently completing a comprehensive study of pre-Islamic Arabic based on documentary sources from the 6th century CE and earlier.