John is an eco-epidemiologist interested in exploring the linkage between health and the state of the environments that humans and animals co-habit. He studies the entire causative chain in infectious disease dynamics at the human-animal nexus for better planetary health. This chain extends from the social and landscape ecology factors extending to risk factor epidemiology on behaviours and other exposures at the individual level. He fully recognizes that such a perspective must allow for greater methodological pluralism, including (i) public health, driven by quantitative epidemiological methods, systems dynamics epidemiology, risk analyses, spatial epidemiology, etc and (ii) qualitative epidemiology, all in systems thinking approach. John holds a Lecturer position at the Department of Environmental Health and Disease Control (EH & DC), School of Public Health (SoPH), Jomo Kenyatta University of Agriculture and Technology (JKUAT). John takes on a mentorship role in SoPH, overseeing postgraduates` research efforts in public health, ensuring that field studies are appropriately designed and implemented, including data collection, management, and interpretation. He is also involved in investigating the occurrence and impacts of endemic zoonoses like Anthrax, Rift Valley fever, Q fever, etc through collaborations with Washington State University-Global Health Kenya and International Livestock Research Institute (ILRI) endemic zoonoses like Anthrax, Rift Valley fever, Q fever, etc.