mohammed mahdi akef () (july 12, 1928 – september 22, 2017) was the head of the muslim brotherhood, an egypt-based islamic political movement, from 2004 until 2010. he assumed the post, that of "general guide" () (frequently translated as "chairman") upon the death of his predecessor, ma'mun al-hudaybi. akef was arrested on 4 july 2013.