The Confederation of African Football's secretary general Hicham El Amrani resigned on Sunday, just over a week after elections swept long-standing president Issa Hayatou from power.
El Amrani, in a letter to African football associations, said he would be departing on Monday, but gave no reason for his decision.The 37-year-old Moroccan had served as secretary general for the last six years.
Hayatou was deposed as CAF president 10 days ago at elections in Ethiopia, where six of his allies on the body's executive committee also lost their positions. The 70-year-old Hayatou had served as president for 29 years.
El Amrani was a Hayatou loyalist, constantly defending his boss, who ruled African football for 29 years, against public and media criticism.
He became secretary-general, initially on an interim basis, in 2010 when Egyptian Mustapha Fahmy moved to global football body FIFA.
Ahmad, who will serve a four-year term, is scheduled to meet CAF staff on Monday at the Cairo headquarters of the 60-year-old organisation.