Bachelor of Science, University Nairobi, 1981. Master of Science, University Nairobi, 1988. Doctor of Philosophy, University Nairobi, 1995.
Agricultural officer, Kenya Government, Kitale, 1981-1985; agricultural officer, Government of Kenya, Kisum, Kenya, 1985-1987; senior research officer, Korea Aerospace Research Institute, Kisumu, 1987-1990; research scientist, Tea Research Foundation, Kericho, Kenya, 1991; lecturer, U. Nairobi, 1992-1995. Key resource person National Extension Project, Kisumu, 1984-1987. Consultant Sugar Research Project, Kisumu, 1987-1990, Upland Rice Development Project, Kenya, 1986-1989, Moribund Tea Soil Research Project, Kericho, 1991-1995.
Member New York Academy of Sciences, Africa Soil Science Society, Soil Science Society of EA.
Married Lillian Anyango, February 29, 1992. Children: Sam Otieno, Teresa Atieno. Married Florence Atieno Okere (divorced 1992).
Children: Edward Omondi, Meshack Adipo.