Search

Harriet Tregoning

Harriet is a visionary leader and policymaker with executive positions at nonprofits, and at federal, state, and local government. She is the director of NUMO, the New Urban Mobility alliance, hosted by WRI Ross Center for Sustainable Cities.

Before joining NUMO, Harriet served most recently as advisor to Ford Smart Mobility, Arcadis, the U.S. Virgin Islands, the State of Louisiana, Georgetown University and many other cities, states and foundations. She also prepared an amendment to Washington, D.C.’s Comprehensive Plan on Autonomous Vehicles. During the Obama Administration, she was principal deputy assistant secretary of the Office of Community Planning and Development at the U.S. Department of Housing and Urban Development, where she initiated the first ever $1-billion National Disaster Resilience Competition. Her work at HUD included helping states, regions, cities, counties and towns across the U.S. build strong foundations for climate change resilience.

Harriet has been a board member of the Washington Metropolitan Transit Authority and the Washington Metropolitan Region Transportation Planning Board. She was the director of the District of Columbia Office of Planning, where she worked to make D.C. a walkable, bikeable, livable, globally competitive and thriving city. Prior to this she was the director of the Governors’ Institute on Community Design, co-founded with former Maryland Governor Glendening. Harriet was also a Loeb Fellow at the Harvard Graduate School of Design.

© 2025 All rights reserved.