He holds a Ph.D. from the University of Ottawa, Canada in Applied-Sociolinguistics, an MA in TEFL from Tarbiat Modares University and a BA in English Language and Literature from Ferdowsi University, Mashhad, Iran. He specializes in Sociolinguistics (Variation Theory, Bilingualism, and Language change) and its application in Second/Foreign Language Acquisition. He is the author of numerous articles appearing as book chapters or in journals such as International Journal of Bilingualism.