He served as the head of state of Madagascar (Chairman of the National Military Leadership Committee) between 12 February and 15 June 1975.
Born in Fort Dauphin, Anosy Region on 13 May[1] 1919, he followed a military career.
During World War II Andriamahazo served in the French Army and participated in the French military campaign against Algerian nationalists in the 1950s.
He served as head of state from 12 February to 15 June 1975, when he resigned in favour of Didier Ratsiraka.
He is widely credited with having prevented an outbreak of civil war during the tension that followed Colonel Ratsimandrava's assassination.