Bachelor of Arts Illinois, 1961. Master of Arts, Northwestern University, 1964. Doctor of Philosophy, Northwestern University, 1970.
Instructor philosophy United States Air Force Academy, Colorado Springs, Colorado, 1966—1968. Visiting assistant professor philosophy University Oklahoma, Norman, 1968—1969. Assistant professor philosophy University New Hampshire, Durham, 1970—1975, associate professor philosophy, 1975—1989, professor philosophy, since 1989.
Editor Continental Philosophy Review, Dordrecht, Netherlands, 1995—2005, associate editor, Netherlands, since 2005. 1st lieutenant United States Air Force, 1965-1968.
Member of North American Heidegger Conference (secretary-convener 1983, 1996), International Society for Hermeneutics and Science, Society for Phenomenology and Existential Philosophy, American Philosophical Association.
Married Judith Lutzhoff, June 13, 1964. Children: Michael Caesar, Adam Bayard, Sarah Elizabeth Champlin-Scharff.