 De Olaso obtained his B.A. (Licenciatura) in philosophy from the University of Buenos Aires and his Ph.D. in the same field from Bryn Mawr College, with a dissertation on Leibniz and ancient skepticism. He taught at the Universidad Nacional de La Plata, the Universidad de Buenos Aires, and the Universidad de San Andrés, all in Argentina. He was also a researcher at the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) of Argentina, and a founding member of the Centro de Investigaciones Filosóficas (CIF, 1965) and its journal Revista Latinoamericana de Filosofía (RLF, 1975). He also seems to have helped Porchat in the foundation of CLE.