Eaton has spent his entire career at the NIH after arriving as a medical officer in the Public Health Service in January 1968, leaving only once for a significant period of time to teach physical chemistry as a visiting professor at Harvard for the Spring semester of 1976. In 1972, he was tenured in the then-new Laboratory of Chemical Physics and became its chief in 1986. Eaton's early work at NIH built on his work on heme proteins, focusing mainly on
hemoglobin and the abnormal aggregation of the mutant form of the protein found in
sickle-cell anemia. In the early 1990s, Eaton began to focus on theoretical and experimental studies of
protein folding and has been particularly influential in the study of fast-folding proteins and applications of single molecule fluorescence spectroscopy. In addition to research, Eaton is credited for developing the Laboratory of Chemical Physics within the
National Institute of Diabetes and Digestive and Kidney Diseases,
NIH into one of the very top biophysics/structural biology departments in the USA. Eaton, as Chief of the Laboratory of Chemical Physics, recruited the legendary theorist, Robert Zwanzig, and scientists such as
Ad Bax,
Marius Clore FRS, Angela Gronenborn,
Attila Szabo, and
Robert Tycko all of whom were subsequently elected to the
US National Academy of Sciences. As Scientific Director from 1986-2018 of the Intramural AIDS Targeted Anti-viral Program of the Office of the Director, NIH, Eaton directed a program that contributed to the sterling record of NIH scientists in meeting the AIDS crisis, a program that has been a model for new special granting programs within NIH. ==Awards and honors==