Dr. William Collins is an internationally recognized expert in climate modeling and climate change science. He is the Associate Laboratory Director of the Earth and Environmental Sciences Area (EESA) at Lawrence Berkeley National Laboratory (LBNL) and was the director of the Climate and Ecosystem Sciences Division (CESD) from 2015 to 2022. Collins is also a Professor in Residence in the Department of Earth and Planetary Science at the University of California.

Dr. Collins is a Fellow of the American Association for the Advancement of Science (AAAS), the American Physical Society (APS), the American Geophysical Union (AGU), and the American Meteorological Society (AMS). Dr. Collins was awarded the DOE Secretarial Honor Award for launching DOE's Accelerated Climate Model for Energy in 2015.

Before joining UC Berkeley and Berkeley Lab, Dr. Collins was a Senior Scientist and Chair of the Scientific Steering Committee for the DOE/NSF Community Climate System Model project at the National Center for Atmospheric Research (NCAR).

Dr. Collins was a Lead and Coordinating Lead Author of the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), a Lead Author of the Fifth IPCC Assessment, and a Lead and Collaborating Author of the Fourth IPCC Assessment, for which the IPCC was awarded the 2007 Nobel Peace Prize.