He was born in the Endodam Kidane Miheret section of the Gojam Debre markos lower parts, the son of an Orthodox priest, Abba Alemayehu Solomon and his mother Desta alemu. He grew up with his mother. As a boy, he began his education within the system of the Ethiopian Orthodox Church, studying at the monasteries of Debre Elias, Debre Werq, and Dima Giorgis where he finally graduated in Qine. Later, he moved to Addis Ababa where he attended several schools, including the Swedish mission school and later at the Tafari Makonnen School for further education of the secular sort. He wrote his first play during this period, YeHabeshan yewedehuala Gabcha which displayed remarkably mature style. In the early 1930s Hadis returned to Gojam and worked as a customs clerk and school headmaster before moving to a teaching position at Debre Markos. Haddis Alemayehu fought during the Italian-Ethiopian war for colonialism until he was captured and sent to the Island of Ponza in the western Mediterranean and then to the island of Lipari, near Sardinia. Freed by allied forces Haddis finally returned to Ethiopia. After brief stints in the department of Press and Propaganda and Ministry of Foreign Affaires, he became the Ethiopian consul in Jerusalem, where he stayed for about two years. There he met and married Kibebe-tsaehay Belay, who had lived and had been brought up in Jerusalem. Haddis then served as a delegate to the international communications conference in Atlantic City, New Jersey. Afterwards, he received a posting to the Ethiopian mission in Washington, D.C. and at the United Nations. His next assignment was in the Ethiopian Foreign Ministry, first as General Director and then as Vice Minister. During the 1956–1960s he worked as Ethiopian representative to UN. After his return Haddis briefly worked at the Ministry of Education followed by appointment as Ambassador to Britain and Netherlands. After his recall to Ethiopia, Haddis, who was not in good health, preferred not to enter into government service. Reluctantly, he agreed to become a minister of Planning and Development and also served in the Ethiopian Senate. During the era of the first two years of Derg regime, Haddis served as a member of the advisory body that had been created to replace the dissolved parliament. However he declined the Derg's offer to become Prime Minister, thus removing himself from any meaningful governmental roles. In the meantime he returned to his literature career when he published Fikr Eske Mekabr, his famous novel about love in a feudal Ethiopia. Not only this, he had written Wongelegnaw Dagna and yelemezat and others. He was eventually awarded an honorary doctorate by Addis Ababa University.