Brent Fultz is the Barbara and Stanley Rawn, Jr., Professor of Materials Science and Applied Physics at the California Institute of Technology. He received his undergraduate degree from MIT, and his Ph.D. from U.C. Berkeley in 1982. Fultz was a Presidential Young Investigator, he received an IBM Faculty Development Award, a Jacob Wallenberg Scholarship, and won the TMS EMPMD Distinguished Scientist Award in 2010. He has authored or co-authored over 300 publications, including a textbook on diffraction and microscopy that is in its fourth edition and second translation, and a new textbook "Phase Transitions in Materials" from Cambridge University Press. Brent Fultz was the Principal Investigator of the ARCS spectrometer project at the Spallation Neutron Source, now complete and in operation. Fultz was the Principal Investigator of the software project Distributed Data Analysis for Neutron Scattering Experiments, DANSE, funded by the NSF. A new effort on computational scattering science is underway. One topic of Fultz's research is how atom vibrations in solids affect the entropy and thermodynamic stability of materials, including how vibrational thermodynamics is altered by temperature or megabar pressures. The goal is to evaluate the entropy of materials from the level of atoms and electrons.