Tom Herring received his PhD from the Earth, Atmospheric and Planetary Sciences department (EAPS) of MIT in 1983. Following his doctorate, he spent almost seven years as a Research Associate at Harvard University. Tom returned to EAPS and MIT in 1989 where he is a Professor of Geophysics since 1997. Tom’s research is in the applications of high precision geodetic measurement systems, primarily the Global Position System (GPS), Very Long Baseline Interferometry (VLBI), and Satellite Laser Altimetry. These applications include deformation monitoring both globally and in selected regions around the world; studies of atmospheric water vapor; and analysis of changes in the rotation of the Earth.