General Assembly as Delegate to the fifth and sixth sessions of the United Nations Committee on Non-Self-Governing Territories, in charge of the fourth commission, Colonial Affairs. 1955-1958: Ambassador and Permanent Representative of Guatemala to the United Nations. 1955: Vice-President of the United Nations Committee on Non-Self-Governing Territories. 1955: Guatemalan United Nations representative at the Special Session of the General Assembly, to commemorate its 10th anniversary, San Francisco, California. 1955: Chief of the Guatemalan Delegation before the X United Nations General Assembly, Commission of Private Affairs. 1956: Chief of the Guatemalan Delegation before the XI United Nations General Assembly; elected Chairman of the Commission for Political Affairs. 1956: Appointed President of the Financial Committee of the United Nations Committee on Non-Self-Governing Territories. 1956: President of the United Nations Committee on Non-Self-Governing Territories. (See United Nations list of non-self-governing territories.) 1957: Elected Chairman of the Political Affairs Commission and President of the Special Political Commission at the XII session of the United Nations General Assembly. 1957: Vice-President of the United Nations Trusteeship Council. 1958: President of the United Nations Trusteeship Council and President of the Group of Latin American Ambassadors before the United Nations. 1958-1966: Returned to Guatemala and engaged in private law practice until 1966, when he was appointed Foreign Minister of his country. 1968: President of the United Nations Twenty-Third General Assembly from 1968 to 1969. References United Nations biography Biographical and Achievements information volunteered by Lucy Dorion, widow of Emilio Arenales, and posted by their grandson, Challen Willemsen (b. 1980). Presidents of the United Nations General Assembly 1922 births 1969 deaths People from Guatemala City Permanent Representatives of Guatemala to the United Nations Universidad de San Carlos de Guatemala alumni Foreign ministers of Guatemala