Drew L Siler

Drew Siler is a Research Geologist and Mendenhall Fellow at the Geology, Minerals, Energy, and Geophysics Science Center. He received a B.S. in Earth and Space Science from University of Washington in 2005 and a Ph.D. in Geology from Syracuse University in 2011. Presently, his research focuses on understanding the role of fault systems and conduits for geothermal circulation.


Dr. Drew Siler has devoted his career to structural geology and tectonics and specializes in Geothermal Systems.

His past research focused on magmatic rifts, mid-ocean ridges, and ophiolite complexes, applying geologic mapping and structural analysis in order to characterize volcanic construction and tectonic deformation processes in magmatic rifts and mid-ocean ridge systems.

Drew's current research is focused on the use of geologic and geophysical data in order to characterize fault systems in 3-dimensions.  This includes geologic mapping and working with a wide variety of data sets including drill cuttings and core, subsurface temperature data, seismic reflection data, potential-field geophysical data, diffuse degassing measurements along faults, helium isotope data, 3D geologic modeling, and structural analyses. His research applies these tools and techniques to evaluate permeability distribution in fault systems and characterizing the geologic controls of fluid flow in geothermal systems.

Professional Experience:

  • 2016-Present, Research Affiliate, Lawrence Berkeley National Laboratory, Berkeley, CA
  • 2016-Present, Research Geologist and Mendenhall Fellow, Geology, Minerals, Energy, and Geophysics Science Center, U.S. Geological Survey, Menlo Park, CA
  • 2013-2016, Post-Doctoral Fellow, Lawrence Berkeley National Laboratory, Berkeley, CA
  • 2011-2013, Post-Doctoral Fellow, Nevada Bureau of Mines and Geology, University of Nevada, Reno
  • 2011 Post Doctoral Fellow, Syracuse University, Syracuse, NY


  • Ph.D., Geology, Syracuse University, 2011
  • B.Sc., Earth and Space Sciences, University of Washington, 2005


  • 2011-Present, Geothermal Resources Council
  • 2006-Present, American Geophysical Union
  • 2006-Present, Geological Society of America
  • 2016-Present, Women in Geothermal

Non-USGS Partners:

  • Lawrence Berkeley National Lab
  • Utah State University
  • Colorado School of Mines
  • University of Nevada, Reno
  • Boise State University
  • Nevada Bureau of Mines and Geology
  • Sandia National Lab
  • U.S. Navy Geothermal Program Office
  • Itasca Consulting Group
  • Innovate Geothermal
  • Ormat Technologies