Our research focuses on studying nuclei experimentally to probe fundamental questions about our Universe. For example, we measure nuclear reactions, decays, and masses in the laboratory to learn about the reactions that power exploding stars or affect their synthesis of chemical elements. At FRIB, our program is focused on measuring the beta and electron-capture decays of proton-rich nuclides using the GADGET and PXCT detection systems. With these experiments, we hope to constrain the nuclear-structure details that are most influential on photodisintegration in supernovae and the explosive burning of hydrogen and helium on the surfaces of accreting compact stars such as white dwarfs and neutron stars. Similar experiments can allow us to search for new modes of radioactive decay, test hypotheses that could explain the origins of dark matter in the universe, or to better constrain the effects of isospin-symmetry breaking in nuclei by testing the unitarity of the Cabibbo-Kobayashi-Maskawa matrix, a cornerstone of the Standard Model. We complement our nuclear astrophysics work at FRIB by running experiments at the TRIUMF user facility in Vancouver, Canada, using the Doppler Shift Lifetimes 2 setup, for which we led the design and fabrication at FRIB.