Theoretical nuclear science aims to explain and predict the structure, dynamics, and origins of visible matter in the universe.  Our nuclear theory group is one of the largest and most influential groups in the world.  In addition to collaborating with our experimental colleagues at FRIB, our research program includes topics such as quantum chromodynamics, fundamental symmetries, physics beyond the Standard Model, nuclear forces, chiral symmetry, structure and reactions of atomic nuclei, simulations of cataclysmic astrophysical events, the creation of new elements, heavy ion collisions and matter under extreme conditions, and emergent phenomena such as superfluidity and collective behavior.  We are also investigating new technologies and algorithms in high performance computing, machine learning, and quantum computing and their impact on the most challenging problems of nuclear science.  Many of our former students and postdoctoral researchers have gone on to become prominent scientists at universities and laboratories in nuclear science as well as leaders in many other fields of science, technology, finance, education, and industry.