Dr. Halliday is the Director of Columbia University’s Earth Institute, founded 22 years ago in an effort to transcend academic disciplines to find solutions to difficult problems facing humanity. He was a professor of Geochemistry at the University of Oxford from 2004-2018 and spent twelve years as a professor at the University of Michigan prior. He spent six years in Switzerland, where he was Head of the Department of Earth Sciences at the Eidgenössische Technische Hochschulein (ETH) in Zurich. His work in isotope geochemistry contributes to our understanding of the formation and evolution of planets in our solar system and the natural processes that modulate climate and planetary processes. Prior to being elected as the Director of the Earth Institute, Dr. Halliday was the Vice President and Physical Secretary of the UK Royal Society where encouraged collaboration between researchers and those in the public and private sectors in the attempt to make progress on climate, energy, and other societal challenges. Dr. Halliday has received many honors, including: the American Geophysical Union’s Harry H. Hess Medal, the European Association of Geochemistry’s Urey Award, the Institute of Measurement and Control’s Oxburgh Medal for technique development in environmental science and engineering, The Geological Society of London’s Murchison Medal, and was elected to the Foreign Associate of the National Academy of Sciences. Dr. Halliday received his undergraduate degree in Geology and his Ph.D. in physics from the University of Newcastle-upon-Tyne.