Prof. Michieka is a member of the University of Nairobi and Founding Vice Chancellor of JKUAT. He is currently the Honorary Secretary of KNAS. He is a graduate and Distinguished Professor of Rutgers University where he obtained his Bsc, MSc, and PhD in Agriculture specializing in weed Science and Environment. He got a Postdoctoral post at the International Institute of Tropical Agriculture (IITA) in Ibadan Nigeria prior to his appointment at the University of Nairobi as a lecturer in 1980. Prof. Michieka has held national and international positions cutting across academic and community services. He served as the: Director General of National Environment and Management Authority (NEMA); Chairman of the Kenyatta University Council; Chairman of the Kenya Agricultural Research Institute (KARI); chairman of the Kenya Education Network (KENET); chairman Inter-University Council for East Africa (IUCEA); chairman of the African Scientific Research and Innovation Council (ASRIC) and Patron of Japanese Ex-Participants (JEPAK). Other committees where he has served include: Kenya Marine and Fisheries Institute (KEMFRI), Commission for Higher Education, currently CUE, and Member Environmental Institute of Kenya (EIK). He was the Chairman of Weed Science Society of Eastern Africa, Member of FAO Weed Specialists, member of the Compliance Committee of the Kyoto Protocol of United Nations Framework Convention on Climate Change (UNFCCC), and Founder of the African Institute for Capacity development, AICAD. While in NEMA, he articulated environmental pollution and degradation and produced the first state of our environment publication. Prof. Michieka has done extensive research in weed science, with special emphasis on chemical weed control. He is a strong proponent of using integrated pest ecosystem management systems in the tropics to avoid environmental pollution. Prof. Michieka is a member of many national and international organizations in weed research and environment. He has trained several masters and PhD students engaged in various local and international organizations. He has published widely in local and international journals and has published four books including Taxonomy of East African weeds translated into Kiswahili plus other university textbooks.