Member of AGU since 1990. Research soil scientist with the U.S. Geological Survey since 1982. Adjunct associate professor at the University of Alaska Fairbanks since 2005. Currently serving as board member of U.S. Permafrost Association. Research topics in soils have ranged from geomorphology and Quaternary geology as applied to geologic mapping and fault hazards, paleoclimate in semiarid regions, to the role of soils in carbon cycle science. B.S in soil resource management, M.S. and Ph.D. in soil science, all from University of California, Berkeley (1982). Served on editorial boards of Geological Society of America Bulletin; Geology; and Journal Geophysical Research—Biogeosciences during its formative years of 2005–2007. Recently served on Steering Committee for National Academy of Sciences Frontiers in Soil Sciences; DOE Biological and Environmental Research Advisory Committee. To date, have authored more than 70 articles, most cited of which are on a quantitative index of soil development as applied to landscape evolution and on carbon storage and exchange in boreal forest soils.