Guojun Gan holds a PhD. degree and a MS degree in applied mathematics from York University, Toronto, ON, Canada and a BS degree in computational mathematics and its applied software from Jilin University, Changchun, Jilin, P.R. China. Currently, Guojun Gan is a Director, Research & Development at the Global Variable Annuity Hedging Department of Manulife Financial, where he is responsible for improving, exploring, and developing mathematical models to support the global variable annuity hedging programs. During his PhD study at York University, Guojun has published one book and several papers on data clustering. While working in industry, Guojun continued to work on scholarly projects in his free time and published two books.