Maina, a one-term MCA, replaces Joel Kairu after garnering 50 of the 75 votes cast in a keenly contested race that attracted 13 contenders.
His closest rival, Martin Kagae, bagged 25 votes.
Karuri will be deputised by Molo MCA Joseph N’gware who pocketed 51 votes.
N’gware trounced Robert Kipyegon Lan’gat of ward MCA who bagged 16 votes of 67 votes cast.
In his enthusiastic maiden speech at the Nakuru County Assembly, Karuri appealed for a concerted effort from the 75 lawmakers in the bid to make the assembly’s oversight and legislative roles a success over the next five years.
Further, he challenged the newly elected members to seek mentorship from their reelected counterparts in an effort builds their capacity in discharging their roles to the electorate.
The speaker, a professional journalist, advised honourable members to be advocates of equitable allocation of resources in the County which is the third main contributor to the country’s Gross Domestic Product.
He tasked members of the house to dedicate their time and energy to the wishes of the highly optimistic electorate by venturing into extensive research in order to be responsive to the focal needs of their constituents.
He also called on the ward representatives to cultivate meaningful interpersonal relations skills among each other to be able to be team players in their respective house committees.