The work of Dr. Eduardo Braun Menéndez (1903-1959) has not been studied enough yet by Argentine historiography. Its influence has been acknowledged in scientific fields as well as Catholic circles although this is not reflected in the quantity and quality of research on his legacy. From the scientific point of view, the goal of historiography focused on reviewing the work of two of his closest colleagues, Nobel Prize Laureates Bernardo Houssay and Luis Leloir. Within the history of Argentine Catholicism, his acknowledgement was relegated due to his differences, by the end of his life, related to the emerging “Catholic University”. That is why this paper recovers the contributions carried out by Dr. Braun Menéndez between 1953 and his death. This period of time includes his direct participation in four different scientific and educational projects: “the Institute of Biology and Experimental Medicine”, “the Catholic Institute of Science”, Conicet and “the Argentinian Catholic University”. To do so, it has been essential to review his influences and desires, the historical background as well as the interests involved and the consequences resulting from all the previously mentioned experiences. In addition, this paper also focuses on his scientific and Catholic principles which were not presented as opposing views in his work.La historiografía argentina no ha estudiado suficientemente la obra del Dr. Eduardo Braun Menéndez (1903-1959). Su influencia reconocida tanto en los espacios científicos como en los círculos católicos difiere de la cantidad y calidad de investigaciones sobre su legado. Desde el plano científico, la atención historiográfica se centró en revisar la obra de dos de sus cercanos colegas, los premios Nobel Bernardo Houssay y Luis Leloir. Desde la historia del catolicismo argentino, su reconocimiento quedó relegado a raíz de sus diferencias, en el final de su vida, con la naciente Universidad Católica. Por este motivo, el siguiente trabajo pretenderá recuperar la contribución del Dr. Braun Menéndez entre los años 1953 hasta su deceso. Este período incluye su participación directa en cuatro proyectos científico-educativos de distinta naturaleza y envergadura: el Instituto de Biología y Medicina Experimental, el Instituto Católico de Ciencias, el Conicet y la Universidad Católica Argentina. Para ello, será imprescindible revisar integralmente sus influencias y anhelos, el contexto histórico y los intereses en juego y los resultados obtenidos en cada una de estas experiencias. Asimismo, se prestará particular atención a sus lineamientos científicos y católicos que en su obra lejos estuvieron de concebirse como contradictorios