Career
He is the first Speaker to serve following the reestablishment of a bicameral Parliament, as mandated by the 2010 Constitution. He vied for reelection in 2007, but was defeated by Lenny Kivuti. He was elected KANU National Organising Secretary in November 2008 and was the PNU constitution committee chairman during the national constitutional talks from 2008–2010.
In April 2011, he was appointed the chairman of the Centre for Multiparty Democracy (CMD), a civil society group that deals with democracy issues in multi-party politics.
Muturi was formerly a judiciary employee serving as a principal magistrate between 1982 and 1997 before retiring from judicial service. He also served as the chairman the Judges and Magistrates Association during the time.