The Geothermal Technologies Office (GTO) is a technology office within the Office of Energy Efficiency and Renewable Energy at the U.S. Department of Energy. This page lists key GTO staff, their assignments, and contact information. To provide feedback on this site or report technical issues, contact


This organization chart shows the GTO management structure. 

GTO Org Chart

General Contact Information

U.S. Department of Energy
Geothermal Technologies Office 
1000 Independence Avenue SW 
Washington, DC 20585

Nearest Metro stop: Smithsonian (serviced by the Blue, Orange, and Silver lines) 

Get directions

Ready to energize your career and bring your skills and talents to our clean energy mission? Visit the GTO Job Opportunities and EERE Career Opportunities webpages for information on open positions. 

Office Director

Dr. Susan Hamm 

Program Managers, Team Lead, and Supervisor 

Dr. Alexis McKittrick, Hydrothermal Resources and Low Temperature and Coproduced Resources

Lauren Boyd, Enhanced Geothermal Systems

Sean Porse, Data, Modeling, and Analysis

Vacant, Operations Supervisor 

Funding Inquiries

If you are seeking funding to develop a technology, please see our Open Funding Opportunities webpage. We do not fund unsolicited proposals. 

Media Inquiries

For media inquiries, please email the EERE communications team at

Merit Review Opportunities

If you are interested in serving as a merit reviewer, please submit your resume or CV to  

National Laboratory Contacts

View national laboratory contacts