His secondary education was undertaken at the Kericho High School where he sat the Ordinary Level of the University of Cambridge Local Examinations Syndicate.

The Commission of Inquiry into the Education System of Kenya (The Koech Report, 2000) was mandated to recommend ways and means of enabling the education system to facilitate national unity, mutual social responsibility, accelerated industrial and technological development, life-long learning, and adaptation in response to changing circumstances.

[9] Despite his achievements, Koech was linked to embezzlement of KSH 19.3 million which occurred during his tenure as the managing director at Kenya Medical Research Institute (KEMRI).

In September 2021, Koech was found guilty of fraudulent acquisition of public property by Senior Principal Magistrate Victor Wakumile.

Due to His outstanding contribution to science and research in Kenya and even globally, Koech was pardoned by the Kenyan President through the power of mercy in November 2022. https://www.google.com/search?q=embezzle&rlz=1C1CHBD_enKE1055KE1055&oq=embezz&gs_lcrp=EgZjaHJvbWUqDAgCEAAYQxiABBiKBTIMCAAQABhDGIAEGIoFMgwIARAAGEMYgAQYigUyDAgCEAAYQxiABBiKBTIGCAMQRRg5MgcIBBAAGIAEMgcIBRAAGIAEMgcIBhAAGIAEMgcIBxAAGIAEMgcICBAAGIAEMgcICRAAGI8C0gEKMTYxODRqMGoxNagCCLACAQ&sourceid=chrome&ie=UTF-8