Bachelor of Science in Civil Engineering, University Wisconsin-Platteville, 1973. Master of Science, University Wisconsin-Madison, 1975, Doctor of Philosophy. in Agricultural and Biological Engineering, 1978. District engineer E.S.B.U., Addis Abeba, Ethiopia, 1970-1971.
Research assistant University Wisconsin, Madison, 1974-1978, research associate, 1979. Assistant professor University Wisconsin, Platteville, 1979-1982. Assistant professor Cornell University, Ithaca, New York, 1982-1988, associate professor, since 1988.