Bachelor in Geology, University California, Riverside, 1965. Master of Arts in Geology, University California, Riverside, 1968.
Senior museum scientist University California, Riverside, 1964-1970. Curatorial assistant Los Angeles County Museum Natural History, Los Angeles, 1973-1980, assistant curator, since 1980, head, Rancho La Brea section, since 1982. Private practice consultant prehistory resources, since 1972.
Research associate appointee Earth Science and Anthropology, San Bernadino County Museum, since 1986. Charter chairman Mojave Desert Quaternary Research Center, since 1987.
Member American Quarternary Association, Paleontological Society, Society Vertebrate Paleontology (sustaining), Southern California Academy of Sciences (board governors since 1989), Pacific Mineralogical Society (honorary life member 1984), Sigma Xi.
Married Laura Louise Gallup, 1962 (divorced 1971). Married Janet Elaine Helms, April 9, 1979. Children: Jessica Morgan Helms, Justin Daniel Thomas.