Sufian Ullah is a PhD scholar at Department of Defence & Strategic Studies, Quaid-i-Azam University, Islamabad. He is currently working as a Research Fellow at the Center for International Strategic Studies (CISS). He holds an M.Phil degree in Strategic & Nuclear Studies, from National Defence University (NDU), Islamabad. He was a visiting fellow at the Center for Non-Proliferation Studies, Monterey, California during fall 2014. His areas of interest include India’s maritime strategy and strategic stability in South Asia. His current work investigates the developing naval competition among regional states and also the emerging dynamics of sea-based nuclear deterrence in South Asia.