Advanced diploma in Medical Laboratory Sciences, Kenya Medical Training college, Kenya, 1991; Master of Science, University Copenhagen, Denmark, 2001; Attending, University Amsterdam, The Netherlands, 2003.
Officer in-charge, division vector-borne diseases, Tana River district Ministry Health, Kenya, 1991—1993, coordinator, primary health care, siaya district. Research coordinator Kenyan-Danish Health Research Project, 1997—2002. Research officer, Centers Disease Control and Prevention, Kenya Medical Research Institute, Kisumu, since 2002, member of the science steering committee member, since 2008.
Member of Centers Disease Control and Prevention (science steering committee member 2007).
Married Celine Resper Otieno, July 20, 2002. Children: Rebecca Awuor Ouma, Leon Feikin Ouma, Cyndy Sandra Ouma.