Colonel Mengistu Hailemariam was conceived in 1932 (Ethiopian Calendar-E.C) from his folks Hailemariam Araya and Gidey Adhana in Maichew.
He finished his primary school in Maichew and his auxiliary training at General Wingate complete optional school in Addis Ababa in 1950 (E.C).
He joined the Harar Military Academy in September 1950 (E.C) and experienced the vital preparing and training and graduated in 1954 as an officer.
Following his extraordinary execution amid his stay in the Military, Colonel Mengistu was conceded authorization by his chiefs to select for advanced education. Accordingly, he joined the Law Faculty of the Addis Ababa University in 1959 (E.C) and got his LL.B. degree in 1963 E.C.
He has filled in as the leader of the Legal Department of the then Imperial Body Guard.