Kimathi is a lecturer in Chuka University in Faculty of Business Studies, Department of Business Administration lecturing entrepreneurship, research methodology among others. He completed his doctorate degree in Entrepreneurship from Jomo Kenyatta University of Agriculture and Technology (JKUAT) in Kenya. He heads entrepreneurship programs in the university. His academic research includes women and youth empowerment and inclusivity in Kenya. He is a trainer, mentor, and consultant in areas of entrepreneurship for both students and practitioners. He has presented various papers in local and international conferences.