Joshua is a research scientist the Ohio State University (OSU) USA in the department of Animal Sciences, Center for Food Animal Health. Prior to his appointment at the OSU he was a lecturer at the Department of Animal Production, University of Nairobi Kenya and research technologist at International Livestock research Institute (ILRI) in the project on Capacity Building for Sustainable Use of AnGR in the Developing Countries. Joshua hold PhD in Animal Genetics and Breeding (2014), a Master of Science in Animal Breeding and Genetics (2007) and Bachelor of Veterinary Medicine (2001) from the Faculty of Veterinary Medicine, University of Nairobi (UoN) Kenya. He studied Molecular Epidemiology and Genetics of swine enteric viruses in a sandwich program between Ohio State University (OSU) and UoN.

Joshua is interested in global one health research, particularly understanding the epidemiology of viral infectious disease pathogens at the human-animal interface to determine their genetic diversity in order to develop accurate diagnostic tools and to implement appropriate control strategies, including vaccine development for specific viral diseases of economic importance in Africa. Through his years of research experience in areas of viral infectious diseases, he has grown increasingly interested in a wide variety of research areas, but particularly in virology, vaccines, animal models and epidemiology.

Joshua is currently a research scientist at the Center for Food Animal Health of the Ohio State University department of Animal Sciences studying the role of maternal immunity and vitamin A in pregnant sows on induction and maintenance of passive lactogenic immunity and protection of suckling neonates against Coronaviruses (PEDV) and Rotaviruses