Yongsoo is currently a researcher in the Department of Physics at the Korea Advanced Institute of Science and Technology (KAIST). He earned his Ph.D. in Physics from the University of Michigan, where he specialized in synchrotron X-ray scattering experiments to elucidate surface and interface atomic structures in oxide systems. During his postdoctoral research at UCLA, he expanded his expertise into electron optics and pioneered atomic electron tomography, a technique for achieving single-atom level 3D structural determinations in nanomaterials. At KAIST, Yongsoo's research focuses on advancing multi-dimensional electron imaging, with an emphasis on precise measurement of 3D atomic arrangements at material surfaces and interfaces, as well as atomic-scale determinations of complex topological orderings.