Colin Hill is an assistant professor of physics at Columbia University. He obtained a Ph.D. in astrophysical sciences from Princeton University in 2014 and subsequently held positions as a Junior Fellow in the Simons Society of Fellows, hosted at Columbia, and as a member in the School of Natural Sciences at the Institute for Advanced Study before joining the Columbia faculty in 2019. He also holds a concurrent position as an Associate Research Scientist in the Center for Computational Astrophysics at the Flatiron Institute. His research is in physical cosmology, primarily focused on theory and analysis related to the cosmic microwave background radiation and the large-scale structure of the universe. He analyzes cosmological data to search for evidence of new physics and to better understand processes involved in structure formation. He is playing a leading role in the Atacama Cosmology Telescope, Simons Observatory, and CMB-S4 collaborations. A recent public-level talk explaining some of his work on the "Hubble constant tension" can be found at https://www.youtube.com/watch?v=5yKrSy18u0A .