In 1935, Frondizi became a professor of philosophy at the National Institute of Teachers of Buenos Aires. In 1937, at the founding of National University of Tucumán, Frondizi became director of the Faculty of Philosophy and Letters through 1946. For academic year 1943–1944, he interrupted his teaching there to take advantage of a scholarship to pursue postgraduate studies at the University of Michigan at Ann Arbor, where he met Roy Wood Sellars and Dewitt Parker. Frondizi was imprisoned, after which he accepted an invitation to teach at the Central University of Venezuela in Caracas for two academic years. In October 1946, Frondizi was dismissed from the Argentine National University of Tucuman. In 1948, American philosophy professor Sidney Hook led a unanimous resolution in his division of the American Philosophical Association that demanded the Republic of Argentina to uphold academic freedom and specifically supported efforts by Frondizi to uphold academic freedom. , then president of Argentia In 1957, Frondizi became rector of the University of Buenos Aires. He promoted the construction of the University City and research activities. He founded the School of Public Health, supported a Department of Vocational Guidance, and extended the scholarship system to students and graduates. During another coup in June 1966, General Juan Carlos Onganía became de facto president, supported by several leaders of the General Confederation of Labour, among these the general secretary, Augusto Vandor. This led to a series of military-appointed presidents. In July 1966 Onganía ordered the forcible clearing of five facilities of the University of Buenos Aires on July 29, 1966 by the Federal Police, an event known as La Noche de los Bastones Largos. These facilities had been occupied by students, professors and graduates who opposed the military government's intervention in the universities and revocation of the 1918 university reform. The university repression led to the exile of 301 university professors, including Manuel Sadosky, Tulio Halperín Donghi, Sergio Bagú, and Risieri Frondizi. In later years, Frondizi taught at the University of Pennsylvania, Yale University, the University of Puerto Rico, the University of Southern Illinois at Carbondale, the University of Texas at Austin, UCLA, Carleton College, and Baylor University.
Frondizi served as president for the Union of Latin American Universities as well as the Latin American society of Philosophy. He was a member of the International Institute of Philosophy in Paris. Frondizi died aged 72 on 23 February 1983 at a hospital in Waco, Texas, of a heart attack, while teaching at Baylor.
Works
Frondizi published 15 books and more than 100 articles, including:
El punto de partida del filosofar
¿Qué son los valores?
Hacia la universidad nueva
La universidad y sus misiones
La Universidad en un mundo de tensiones. Misión de las Universidades en América Latina
Introducción a los problemas fundamentales del hombre
