John Hoffmann


John Hoffmann is the Director of the Pacific Islands Water Science Center in Honolulu, Hawaiʻi. He joined the USGS in 1984 as a geologist at the Hawaiian Volcano Observatory to help monitor Kīlauea Volcano on Hawaiʻi Island. Following graduate school in Honolulu, John joined the Pacific Islands Water Science Center in 1988, where he worked on freshwater/saltwater interface issues in Hawaiʻi and Micronesia. By 1995, John transferred to the USGS Arizona Water Science Center where he served many roles, including six years as Center Director. From 2013 to 2020 John held several positions with the USGS Water Mission Area in Reston, VA. His interests are in groundwater availability, groundwater/surface-water interaction, and the application of geophysical methods for hydrological studies. John earned a Bachelor’s degree in Geology from Michigan Technological University and a Master’s degree in Geology and Geophysics from the University of Hawaiʻi at Mānoa.