Prof. Ogallo holds B.Sc (Hons), M.Sc. and Ph.D. degrees in meteorology from University of Nairobi. His main research areas of interest include climate change, Climate modeling, prediction , early warning and applications for addressing climate change and integrated disaster risk reduction challenges.

Prof Ogallo academic life has evolved at the Department of Meteorology University of Nairobi, over years where has has grown from a tutorial fellow in 1975 to a full professor. He was on leave of absence from the University between 1994-2019. He seconded to the agaovernment as  the Secretary /CEO of Kenya National Council for Science and Technology before joining the World Meterorological Organization ( WMO) between 1996-1999.  He joined UN regional drought  monitoring center in Nairobi (DMCN) in 2000 as a project coordinator. DMCN grew under him to became the IGAD Climate Prediction and Application Centre (ICPAC).   ICPAC is an IGAD Centre for climate prediction and early warning in support of disaster risk reduction, Environment management and sustainable development efforts for 11 countries in the Greater Horn of Africa. Prof Ogallo was the founding director and managed DMCA upto 2015.  Prof Ogallo also coordination an IGAD-UNDP project for buildig capacity for regional disater resilience between 2015-2018. He returned to the Department of Meteorology University of Nairobi in 2019 , and retired in January 2020.

Prof Ogallo served in various capacities at Global, regional and national levels. He has been a contributor to climate change asessmements by the Intergovenmental Panel on climate change (IPCC), and a member of the IPCC team of scientists who received the Nobel Prize Awad forbefore joining  the year 2007. He is a Member of the (i) WMO Scientific Advisory Panel (SAP), (ii)  Member Scientific Advisory Committee (SAC) for Climate Research for Development (CR4D) a partnership of the African Climate Policy Centre (ACPC) of the United Nations Economic Commission for Africa (UNECA), the African Ministerial Conference on Meteorology (AMCOMET), the World Meteorological Organization (WMO), and the Global Framework for Climate Services (GFCS); (iii) Co-Chair of the Solar Radiation Management (SMR) Governance Initiative (SRMGI) committte, founded in 2010 by the Royal Society, The World Academy of Sciences (TWAS) and Environmental Defense Fund (EDF) for getting developing countries into the conversation about SRM and research, etc

Prof Ogallo is a fellow of ---(TWAS), ----(AAS), ------(KNAS) , Kenya Met society among many others. He  has supervised and also examined very many MSc and PhD student all over the world, and has published widely in many professional jpournals as well as books