Dr. Mills is a project scientist at the National Center for Atmospheric Research in Boulder, Colorado. He serves as the community liaison for the Whole Atmosphere Community Climate Model (WACCM), a comprehensive numerical model spanning the range of altitude from the Earth's surface to the thermosphere. Dr. Mills received his S.B from M.I.T. in Earth, Atmospheric, and Planetary Sciences, and his Ph.D. work at the University of Colorado. His research has focused on stratospheric ozone, climate, aerosols, volcanic eruptions, geoengineering, and nuclear winter. He has participated in field measurement campaigns, which have taken him to Antarctica and above Arctic Circle. He has received the Marinus Smith Teaching Award from the University of Colorado Parents Association.