Chief, Nutrition Section, Pan American Sanitary Bureau, and Director, Institute of Nutrition of Central America and Panamá. Work in Rochester and Panamá was done during the tenure of a Merck National Research Council fellowship in the Natural Sciences.
Chief, Micro-Analysis Laboratory, Institute of Nutrition of Central America and Panamá.
Chief, Special Protein Section, Institute of Nutrition of Central America and Panamá.