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OST-R's Key Officials

Office of the Assistant Secretary
Assistant Secretary, Vacant
Deputy Assistant Secretary and Chief Science Officer, Robert C. Hampshire, PhD 

Bureau of Transportation Statistics
Director, Patricia S. Hu
Deputy Director, Dr. Rolf Schmitt
Public Affairs Contact, Ethan Alpern

Highly Automated Systems Safety Center of Excellence
Director, Stephen Zoepf

Intelligent Transportation Systems Joint Program Office
Acting Director, Brian Cronin

National Coordination Office, Space-Based Positioning, Navigation and Timing
Director, Harold W. "Stormy" Martin III

Office of Positioning, Navigation and Timing & Spectrum Management
Director, Karen Van Dyke

Office of Research, Development and Technology
Director, Dr. Firas Ibrahim

Office of Technology Policy and Outreach
Director, Timothy Klein

Transportation Safety Institute
Director, Dr. Troy Jackson 
Senior Liaison, Christine Lawrence

U.S. DOT Volpe Center
Director, Anne D. Aylward
Director for Research and Innovative Technology, Stephen M. Popkin, PhD 
Director for Operations, Susan M. Connors
Director of Center for Policy, Planning, and Environment, Gregg G. Fleming
Director of Center for Safety Management and Human Factors, Maura Lohrenz
Director of Center for Infrastructure Systems and Technology, Luisa Paiewonsky
Director of Center for Communications, Navigation, Surveillance Systems, and Engineering, Jonathan Walker, PE, PhD 

Public Affairs Contacts: 202-366-5128 

Learn more about our activities

View our Organizational Chart

Office of the Assistant Secretary for Research and Technology organizational chart