James G. Berryman graduated from the University of Kansas (Lawrence) with a B.S. in physics (with Honors) in 1969 and received an M.S. (1970) and a Ph.D. (1975) in physics from the University of Wisconsin (Madison). He was an Assistant Scientist at the Mathematics Research Center on the University of Wisconsin campus from 1975 to 1976. From 1976 to 1977, he worked as a Research Geophysicist for Conoco, in Ponca City, Oklahoma. Jim was a National Science Foundation Postdoctoral Researcher at the Courant Institute of Mathematical Sciences of New York University from 1977 to 1978, and subsequently spent three years at AT&T Bell Laboratories in Whippany, New Jersey, as a Member of Technical Staff, while working on problems related to underwater sound and ocean acoustics. Since 1981, his permanent position has been with Lawrence Livermore National Laboratory, where he is now a Physicist in the Computational Physics Group, Atmospheric, Earth, and Energy Sciences Department, Energy and Environment Directorate. In recent years, he has held visiting positions at the Courant Institute, at the Institut de Physique du Globe de Paris, at the Applied Physics Laboratory of the University of Washington in Seattle, and at Stanford University. His areas of expertise include (1) rock physics and poroelasticity, (2) inverse problems in acoustics, seismology, and electromagnetics as well as applications to time-reversal imaging, and also (3) the theory of composite materials. He has been a Consulting Professor of Geophysics at Stanford University since 1992, as well as a frequent visitor in the Mathematics Department. He is a member of the American Physical Society, the American Geophysical Union, The Acoustical Society of America, and the Society of Exploration Geophysicists.