President Uhuru Kenyatta has nominated Amb Antony Mwaniki as the Public Service Commission chairperson.
A parliamentary committee will now conduct approval hearings.
Muchiri is currently Kenya's Ambassador to Cuba.
He concurrently serves as the High Commissioner, Ambassador and Permanent Representative of Kenya to Jamaica, Barbados, St. Kitts & Nevis, Guyana, the Dominican Republic, and the CARICOM (the Caribbean Community).
Twelve candidates had been shortlisted for the position which fell vacant following the death of Stephen Kirogo on May 14.
PSC vice chairperson Charity Kisotu and former Special Programmes PS Mahboub Mohammed Maalim were among those shortlisted.
Others were Selly Jemutai Kimosop, Charles Onami Maranga, Kennedy Juma Mulunda, Susannah Rebecca Ochieng, Maurice Mutinda Wambua, Nancy Oundo Dalla, Elseba Jepkoech Too, David Kung'u Njoroge and Duke Omondi Orata.
The shortlisted candidates were interviewed at Harambee House, Nairobi, on November 10 and 11.
Uhuru declared the post vacant on August 24 after the death of Kirogo at a Nairobi hospital.
Adverts were carried in local dailies published on October 14 and republished on October 18.
The selection panel received 99 applications (73 male and 26 female). Of the applicants 25 had doctoral degrees, 49 (masters), 23 (bachelors) and two (diplomas).
Muchiri joined the civil service as an entry level assistant inspector in the Inspectorate of State Corporations.
Later, he served as a District Officer and in other roles in the Ministry of Interior; Information and Planning.
He also served in the State Department for ASALs; the Cabinet Affairs Office and Office of the Head of the Public Service; and the Ministry of Foreign Affairs.
