Associate of Arts, Harbor College, Wilmington, California, 1962. Bachelor, Chapman College, Orange, California, 1963. Master of Arts, California State University, Fullerton, 1969.
Doctor of Philosophy, Texas Technology University, Lubbock, 1977.
Instructor Chapman College World Campus, Orange, California, 1965—1966, Texas Technology University, Lubbock, Texas, 1969—1975, project director, 1976—1978. Associate professor of history Western Texas College, Snyder, 1978—1980. Lectr, California State University, Fullerton, 1981—1984.
Curator Los Angeles County Museum of Natural History, Los Angeles, 1984—1991. Associate professor of history Chapman University, Orange, since 1993. With United States Army, 1966-1968, Germany.
Member of Association of Third World Studies, American History Association.
Son of Lloyd Leon and Thelma Louise Cumiford. Divorced; 1 child Senta Simone.