Bachelor of Science in Agriculture, Nairobi (Kenya) University, 1980. Master of Science in Agronomy, Andra Pradesh Agricultural University, Hyderabad, India, 1983. Doctor of Philosophy in Agronomy, Nairobi (Kenya) University, 1997.
Farming system agronomist National Dryland Farming Research Station, Machakos, Kenya, 1980-1986. Officer in charge, maize agronomist Nyandarua Agricultural Research Station, Ol Joro Orok, Kenya, 1986-1987. Research officer Coffee Research Foundation, Ruiru, Kenya, 1987-1990, senior research officer Kenya, since 1991.
Officer in charge Nyandarua Agricultural Research Station, Oljoro Orok, 1986-1987. Head agronomy section Coffee Research Foundation, Ruiru, 1996-1900. Secretary general application-specific integrated circuit, Nairobi, 1996-1997.
Member task force on coffee liberalisation Minister of Agriculture, Livestock Development and Marketing, 1996. Member task force on strategies to enhance coffee productions in Kenya, 1998-1999. Member Ministeried Committee on the way forward for the coffee industry, 2000.
Member African Coffee Research Network, Eastern African Weed Science Society, Weed Science Association Eastern Africa.
Married Lilian Nini Kironji, May 25, 1985. Children: John, Ephraim, Samuel.