He was Kenya’s third head of civil service born in 1929.
He was a businessman with interests in real estate, insurance, coffee farming and the hotel industry.
He also served as former chairperson of the East African Breweries Limited (EABL) and The Cooper Motor Corporation (CMC).
The body was discovered by a house help who went to his apartment located on Nandi Road. She became suspicious because Githae had not been picking phone calls for a while. Githae lived alone in the apartment.
Kiereini's son Githae, was found dead at his Karen home in 2017.
President Uhuru Kenyatta has sent a condolence message and encouragement to the family, friends and relatives of former Head of Public Service and Secretary to the Cabinet Jeremiah Gitau Kiereini.