Jiannan Wang is a postdoctoral researcher at Lawrence Berkeley National Laboratory. He received his Ph.D. in Geophysics from the University of Houston. His Ph.D. dissertation mainly focuses on using the acoustic method, such as seismic and high-frequency sonar, to estimate the physical properties of the ocean bottom and subsurface. As a member of Allied Geophysical Laboratories (AGL), he has been using physical modeling method to collect scaled seismic data for testing theories, processing techniques, and imaging methods. After joining LBL, he is currently working on using reflectometry method, including tube waves and electromagnetic waves, to access the integrity of the metal casing wells.