Renée Hlozek received her BSc degree in Mathematics from the University of Pretoria and her BSc (Hons) and MSc degrees from the University of Cape Town, in South Africa. She completed her DPhil in Astrophysics at Oxford University as a South African Rhodes Scholar. Her thesis, entitled "Probing the early universe and Dark Energy with multi-epoch cosmological data," used data from both the Atacama Cosmology Telescope (ACT) and the Sloan Digital Sky Survey Supernova Survey (SDSS-II SN) to constrain the current cosmological model. She uses small-scale measurements of the microwave sky to constrain the initial conditions in the universe, and to characterize the physics at an epoch roughly four hundred thousand years since the Big Bang. Her interest in novel statistical techniques led her to develop BEAMS, a Bayesian method for performing parameter estimation in the presence of contaminated cosmological data, which she applies to datasets such as the SDSS-II SN survey. She is currently the Lyman Spitzer Jr. Postdoctoral Fellow in Theoretical Astrophysics in the Astrophysics Department, where she works on a variety of cosmological and statistical problems, including preparing for the upcoming data from ACTPol, the polarization-sensitive follow-up to ACT. In addition to advising and supervising student research projects, she has been co-organizing the Undergraduate Summer Research Program in the Department of Astrophysics since 2012; she also participates in the Prison Teaching Initiative in New Jersey and formed the Hope-Princeton exchange which brings female students in astronomy to work in Princeton over the summer. She was named one of the Mail and Guardian's 200 Young South Africans for 2012, and is a 2014 TED Senior Fellow.