While unveiling him in Wamumu on Tuesday, Waiguru described Mutugi as a diligent servant who has exhibited hard work in his current capacity.
Waiguru said the appointment will not only help strike gender but also regional balance in the county leadership positions.
Mutugi comes from Mwea West substituting Peter Ndambiri from Mwea East who deputized Waiguru during her first term.
Mutugi previously served as Wamumu ward MCA between 2013-2017 before being nominated to the position of county education CEC in 2017.
While accepting the nomination, Kinyua thanked the governor for consideration pledging to continue being loyal to the governor and demonstrate servanthood and result-oriented leadership.