Métraux's professional career was equally cosmopolitan. His interest for anthropology and original languages, began early in his life when his father a medical doctor took an overseas appointment, relocating his family from Lausanne
Switzerland to Mendoza Argentina. During his research years in Argentina, his work was centred in the study and interpretation of native languages, allowing him to create an extensive record of Argentine native ethnic groups, including: Calchaquí, Guaraní, Chiriguano, Toba & Wichís, and the Uros-Chipaya. While working on this research, he was invited to collaborate in the writing of the Handbook of South American Indians. Eventually, he founded and became the first director (1928 – 1934) of the Institute of Ethnology at the
University of Tucuman, in Argentina. During this period, he also published an article for the Universidad Nacional De la Plata Museo of Argentina called "Mitos y cuentos de los Indios Chiriguano" Myths and Stories of the Chiriguano Indians. by Walter Knoche, 1911 In 1934–35, he led a French expedition to
Easter Island, publishing an ethnology of the indigenous people of the island. This included a description of one the last women to receive traditional facial tattoos,
Ana Eva Hei. In 1936 –38, he was a Fellow of the
Bishop Museum in
Honolulu. In 1939, he returned to Argentina and
Bolivia for field research on a
Guggenheim Fellowship. In 1940, upon his return to the United States from South America, he was in residence at
Yale University with a renewal of his
Guggenheim Fellowship. That next year, he worked with the Cross Cultural Survey (now the
Human Relations Area Files) on South American data and was associated with such people as
John Dollard,
Leonard Bloomfield, and others of the Institute of Human Relations. In 1941, he joined the staff of the Bureau of American Ethnology of the Smithsonian Institution. There, from 1941 to 1945, he played an important role in producing the monumental Handbook of South American Indians. Perhaps no other writer contributed as many pages to this work. As the editor, Julian Steward, acknowledges, "The extent of his (Métraux's) contribution is by no means indicated by the large number of articles appearing under his name. With an unsurpassed knowledge of South American ethnology and ever generous of his time, his advice and help to the editor and contributors alike have been a major factor in the successful completion of the work." (Vol. I, p. 9). In addition, Métraux taught briefly at
University of California, Berkeley (1938), the Escuela Nacional de Antropología,
Mexico (1943), the
Colegio de Mexico (1943), and the Faculdad Latino-Americana de Ciencias Sociales,
Santiago, Chile (1959–60). ==UNESCO==