Professor Tamara Davis is Australia's pre-eminent theoretical cosmologist, specialising in bridging the gap between cosmology theory and observations with a focus on dark energy. Throughout her career she has fortified the foundations on which modern cosmology is built. She has led efforts to make robust measurements of the homogeneity-scale of the Universe, invent a new way of measuring galactic distances, put upper-limits on the mass of the neutrino, and measure time-dilation in distant supernovae. Professor Davis has also led the cosmological analyses of several major astronomical surveys, resulting in deeper understanding of the properties of dark energy and constraining potential advanced theories of gravity.