Bachelor of Science in Geology, University Tulsa, 1955. Postgraduate, University Center, Caracas, 1958. Postgraduate, Johns Hopkins University, Washington, 1987.
Petroleum geologist Shell Venezuela/Shell Indonesia, Maracaibo and Djakarta, 1955-1965. Exploration manager Venezuelan Petroleum Corporation, Caracas and Maracaibo, 1965-1967. Senior research geologist Phillips Petroleum, Bartlesville, Oklahoma, 1967-1969.
Manager marketing Shell Petroleum Company, Caracas, 1969-1974. Chief operations officer Meneven, 1979-1981. Fellow Harvard University, Cambridge, Massachusetts, 1981-1983.
Hydrocarbons advisor Interam. Development Bank, Washington, since 1983. Delaware OPEC, 1966-1969.
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Trustee University Tulsa, since 1987. Member Venezuelan Engineering College.
Married Marianela Criollo. Children: Gustavo Junior, Corina, Ana.