1922 – Born in Guatemala City on the 10th of May.
1940 – Juridical Sciences from the Universidad de San Carlos de Guatemala.
1946 – Associated with the United Nations Educational, Scientific and Cultural Organization.
1946 – Founder and Head of Division of Relations of the United Nations and its specialized agencies.
– Legal Counselor to the UNESCO Preparatory Commission.
– Deputy Head of Section of External Relations and External Relations Counselor for UNESCO.
1947 – UNESCO Deputy Head of Mission to Latin America, together with Sir Julian Huxley and Professor Samuel Ramos. The mission intended to visit each Latin American country and invite them to participate in the first UNESCO General Conference.
1948 – Secretary Assistant to the External Relations Commission and Administrative Affairs at the I UNESCO General Conference, México.
– Proposed the plan to organize the National Commissions of the member countries, based on the experience of the League of Nations and the International Institute of Intellectual Cooperation. When the plan was accepted, he was named Emissary to UNESCO, and visited a number of Latin American countries, promoting the creation and/or reorganization of National Commissions.
– UNESCO representative before the IX Pan-American Conference, Bogotá, Colombia.
– UNESCO Head of Latin American Mission.
– Secretary General of the UNESCO International Conference of the Hylean Amazon, which met in Lima, Perú and Manaus, Brazil, having previously visited the participating governments in order to ensure their support and cooperation.
– UNESCO General Secretary at the Regional Conference on Scientific Cooperation, Montevideo, Uruguay.
– Secretary of External Relations Commission and Administrative Affairs at the II UNESCO General Assembly, Beirut, Lebanon.
1949 – Returned to Guatemala and engaged in private law practice.
1954 – Attended the IX and X United Nations 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 – Ambassador and Permanent Representative of Guatemala to the United Nations.
– Vice-President of the United Nations Committee on Non-Self-Governing Territories.
– Guatemalan United Nations representative at the Special Session of the General Assembly, to commemorate its 10th anniversary, San Francisco, California.
– 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.
– Appointed President of the Financial Committee of the United Nations Committee on Non-Self-Governing Territories.
– President of the United Nations Committee on 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.
– Vice-President of the United Nations Trusteeship Council.
– President of the United Nations Trusteeship Council and President of the Group of Latin American Ambassadors before the United Nations.
1958 – 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.
1969 – Died in Guatemala City on the 17th of April.