Prof. Ayuku attained a Bachelor of Science in Psychology from Mid-American Bible College, Master of Arts in Clinical Psychology from Texas Southern University, Houston Texas and Doctor of Philosophy in Clinical Psychology from University of Maastricht in the Netherlands.
He worked for Texas Department of Mental Health and Mental Retardation; at Richmond State School, Texas, as a psychologist and a member of the interdisciplinary team, monitoring self-abusive and aggressive behavior incidents with the aim of developing behavior therapy programs for the institutionalized children way back 1983/88. Since then he has been intrigued with how children
develop and adopt under the most difficult conditions, like street children the focus of most of his research and publications.
He came to Moi University in 1990 as a founder member of the department of behavioral sciences in the school of medicine. He developed the curriculum of behavioral sciences for the medical students; and ever since he has been involved in giving lectures and guiding students in tutorials and field trips for
Community Based Education and Service (COBES); an important component of problem-based learning offered to Moi University medical, Nursing, dental and environmental students at the college of health sciences. Besides, as a clinical psychologist, he provides psychotherapy and counseling services at Moi Teaching and Referral Hospital and other private hospital within Eldoret town. He has been head, of behavioral sciences department on different junctures in the last 28 years. In addition, he has been involved, as team leader, in development of curricula in the University including; Bachelor of Medical Psychology and Masters of Science in Clinical Psychology.
Ayuku has conducted extensive comparative cross-sectional and longitudinal studies on the social, physical, and mental health of highly vulnerable children in Eldoret, Kenya. Comparing children both on- and of-the-street to children living in shelters and “normal” children who were recruited from schools in the area, Ayuku specifically evaluated: different perspectives on the causes and activities of street children, children’s support and personal social networks using Social Network Analysis, and the psychosocial and nutritional status of these children.
Ayuku is Co-founder director and member of the board of Tumaini Children’s invention center, member of Bioethics Society of Kenya (BSK), member of the Kenya University Quality Assurance Network (KuQAn), Institutional Research and Ethics Committee (IREC), and Kenya Guidance, Counselling Psychological Association.