Bachelor of Science in Life Sciences, University Nairobi, Kenya, 1985. Master of Science in Biochemistry, University Nairobi, Kenya, 1996. Doctor of Philosophy in Medicine, Kanazawa University, Japan, 2003.
Assistant parasitologist Ministry of Health, Nairobi, Kenya, 1986—1987, assistant microbiologist Kenya, 1988—1989. Assistant research officer (virologist) Kenya Medical Research Institute, Kenya, 1990—1996, research officer (virologist) Kenya, since 1997. Supervisor, Human Immunodeficiency Virus/AIDS laboratory Kenya Medical Research Institute, Nairobi, Kenya, since 1996.
Visiting lecturer Shiga Medical University, Otsu, Japan, since 2001. Advisor, Human Immunodeficiency Virus/AIDS Kenya National AIDS Control Program, Nairobi, Kenya, since 1996. Advisor/resource person, Human Immunodeficiency Virus/AIDS Kenya Ngo AIDS Consortium, Nairobi, Kenya, since 1996.
Coordinator Terik Community Program, Kisumu, Kenya, since 2001. Editor, Kemri Human Immunodeficiency Virus/AIDS Update Journal Kenya Medical Research Institute, Nairobi, Kenya. Participant various international professional conferences.
Fundraising coordinator for education of socially disadvantaged children Terik community program, Nandi, Kenya, 2001—2003. Creation of awareness for support of education of socially disadvantaged children in africa Hokuriku(Japan)-Africa Association, Kanazawa, Japan, 2002—2003. Member of Japan AIDS Society (associate.
Member 2000-2003), International Acquired Immune Deficiency Syndrome Socity (life), Kenya AIDS Society (associate. 1996—2003).
Married Jemisik Elizabeth Saina, May 6, 1989. Children: Kipkemboi Denis, Chepchirchir Caroline, Chepkosgei Charity, Kibet Collins.