Dr. Yaqi Wang is a research scientist with over sixteen years’ experience, primarily in computational radiation transport in support of method and code development for advanced modeling and simulations. As a Ph.D. graduate student at Texas A&M University he applied the adaptive mesh refinement solution techniques for the multigroup SN (discrete ordinates method) transport equation using a higher-order discontinuous finite element method. After joining INL (Idaho National Laboratory) in 2009, he has been the main developer of three computational transport codes for reactor analysis, INSTANT, Rattlesnake/MAMMOTH and Griffin. INSTANT is a transport solver based on variational nodal method (or hybrid finite element PN method) with its own mesh framework for PHISICS package. Rattlesnake is the MOOSE-based radiation transport application, that has been used for TREAT (transient reactor test facility) transient modeling and simulations. Rattlesnake is integrated in MAMMOTH application for multiphysics nuclear reactor analysis. Rattlesnake/MAMMOTH were part of BlueCRAB package for NRC. Rattlesnake/MAMMOTH became Griffin, the NEAMS (Nuclear Engineering Advanced Modeling and Simulation) of U.S. Department of Energy-Office of Nuclear Energy (DOE-NE) reactor multiphysics analysis code for advanced reactor designs, co-developed by INL and ANL (Argonne National Laboratory) in 2020 and Dr. Yaqi Wang is the lead developer ever since. As the lead developer of Rattlesnake, Griffin, he mentored junior staff at INL and developers from ANL. His role as the Griffin lead developer includes leading software design discussions, performing code implementation, code review, code training, code maintenance and user support. He has 164 publications including journal articles, conference papers and reports, based on his Google scholar page (https://scholar.google.com/citations?user=a9VRW2EAAAAJ) with 2918 citations with h-index 28.