He holds a Doctorate in Chemistry, a Master of Science Degree in Chemistry and a Bachelor of Education Degree in Science. Throughout his career, He joined this University in the year 1991 as a Lecturer under Chemistry Department where he lectures up to date ,Prof Thiong’o has held various esteemed positions including being Chairman of Chemistry Department(JKUAT), the Dean of School of Physical Sciences(JKUAT) then Dean School of Mathematics and Physical Sciences in the University(JKUAT).
He is renowned for his contributions to Academia, including the development of new Academic programs. He has received Academic honor such as recognition in ‘who is who’ in Science and Engineering in world,2001,the Association of commonwealth staff scholarship from August-December 1999 and Teaching Assistantship awards from Kenyatta University,1982-1988.