Former President Mwai Kibaki mourns Joe Nyagah's death. By: Mukami Wa Embu Joseph Nyagah was a cabinet minister during Kibaki's tenure. Hon. Joseph Nyagah, EGH, MP. (Photos). "As my Minister for Cooperatives, Joe distinguished himself as a champion of the interests of wananchi by nurturing Kenya's Sacco movement and propelling it several notches higher. During his tenure at the Ministry, Kenya's Sacco movement grew into one of the largest in the continent peaking at 10. 1 million subscribers in 2010, " the former president stated in a message dispatched by his Private Secretary Ngari Gituku. "The Cooperative Bank of Kenya went public and was listed at the Nairobi Stock Exchange in 2008 courtesy of Joe's focused leadership, " he added.