Who We Are

The Under Secretary provides departmental oversight for the offices of the Assistant Secretary for Research and Technology (OST-R), Assistant Secretary for Aviation and International Affairs (OST-X), Assistant Secretary for Transportation Policy (OST-P), Assistant Secretary for Multimodal Freight Infrastructure and Policy (OST-F), and the Build America Bureau (National Surface Transportation and Innovative Finance Bureau) (OST-Z), coordinating transportation policy development with the goal of making the nation’s transportation resources function as an integrated national system.

The Office of the Under Secretary comprises multiple offices with a broad range of functions and missions, including domestic and international transportation policy development and implementation, economic and legislative analysis, regulatory oversight, credit assistance, and innovative financing opportunities.