He continued his studies at the School of Tropical Medicine in London in 1912, and a year later returned to his alma mater to serve as professor.
Monge also was vice president of International Studies Conference Stations of the Great Cultures, held in Switzerland in 1948; President of the Peruvian delegation of the II General Assembly of UNESCO in Beirut in 1948; Peru delegate at the Conference on Narcotic Drugs of the UN, New York in 1950; Rapporteur of the International Congress of Medicine in Buenos Aires in 1964, among other prestigious positions.
He was also honorary professor of the Faculty of Medical Sciences at the University of Cochabamba, Bolivia in 1947, a member of the Executive Council of the National Commission of Peru for Cooperation with UNESCO in 1962, as well as consultant on indigenous and tribal peoples of the International Labour Organization in 1962.
For his work as a professor, researcher and doctor at various hospitals, Dr. Monge was recognized and held in distinction by a number of educational and medical institutions.
Medrano published more than 150 scientific texts, whose main themes are medicine, parasitology, biology, Andean pathology, anthropology and history.