Political life Kiunjuri was first elected to the parliament in 1997 as a member of the Democratic Party.
[1] Kiunjuri has also served in the Kenyan cabinet in various capacities.
In 2015, he became the cabinet secretary for Devolution and Planning, replacing Anne Waiguru after she resigned due to corruption allegations.
Following the Jubilee government's retention of power in the 2017 general elections, President Uhuru Kenyatta appointed Kiunjuri to be the Cabinet Secretary for Agriculture in 2018.
[3] In the 2022 Kenyan general election, he returned as MP for Laikipia East Constituency.