My research covers five related areas involving the use of seismic data to investigate Earth structure and processes over a range of scales, from the deep mantle to the surface. Tightly integrated with my research is an education effort to improve diversity in the geosciences. He is the recipient of many honors and awards. At Penn State he has received the President’s Award for Excellence in Academic Integration, the Diversity Recognition Award, and the Wilson Award for Outstanding Service from the College of Earth and Mineral Sciences. He is a Fellow of the American Geophysical Union, and is also the recipient of the Paul G. Silver Award for Outstanding Scientific Service from the American Geophysical Union.