Ambar Johnson / Program Director

Ambar is the Program Director for LivableStreets, overseeing Vision Zero, Better Buses, and managing all aspects of the Emerald Network including advocacy, project oversight, and technical assistance.

Ambar's work is guided by her belief that "transportation is freedom" to create abundant, safe and accessible infrastructure and options. Previously, she served as a transportation planner at VHB, leading technical analysis for a range of transit feasibility studies and comprehensive plans in the Southeast. Before that, she worked with the Atlanta Bicycle Coalition and her neighbors to expand Relay Bike Share by using transportation as a tool for community building.

Ambar is a graduate of the Georgia Institute of Technology where she received her Bachelor of Science in History, Technology, and Society with a concentration in Civil Engineering.



Executive Committee


Stacy Thompson | Executive Director
LivableStreets Alliance

Stacy is the Executive Director of LivableStreets, overseeing all programs including Vision Zero, Better Buses, and the Emerald Network, and ensuring overall programmatic and operational excellence for the organization.

A relentless optimist, Stacy is undaunted by the many challenges facing Metro Boston today, including access to jobs and affordable housing, improving safety and public health outcomes, and building climate resiliency. She believes the City can address these challenges head on by improving one of our most important systems- transportation. Stacy believes that improving our streets isn’t simply a transportation issue, but one of justice, equity, and opportunity.

Previously, Stacy served as the Director of Events & Sponsorship at Ceres, where she developed the strategic focus, content, and communications for Ceres' major events. She also worked for the Office for Peace and Justice at the Archdiocese of Chicago where she collaborated with community partners to organize educational forums and supported a broad array of social justice initiatives. She has a Master of Arts in Social Justice from Loyola University, Chicago and a Bachelor of Arts in Religious Education from Saint Vincent College.



Matt_Kiefer.pngMatt Kiefer | Co-Founder of Emerald Network Initiative
Land Use Attorney, Goulston and Storrs

Matthew Kiefer is a land use attorney at Goulston & Storrs, focusing on obtaining site control and development approvals from public agencies for complex urban projects.  These include market-oriented and affordable housing, commercial and mixed-use developments, and facilities and master plans for educational, cultural and health-care institutions.  He co-chairs the firm’s Climate Change Resilience Task Force.  He is the Chair of the Boston Municipal Research Bureau, which supports best practices in municipal governance, and co-chairs the Council of Advisors of Historic Boston, a non-profit redeveloper of historic buildings. He serves on the Advisory Board and Management Committee of ULI Boston. He is a Fellow of the American College of Real Estate Lawyers and was a Loeb Fellow at the Harvard Graduate School of Design. He has taught in the urban planning programs at MIT and Harvard and has written on land use law and policy for numerous publications.  



Steve_Miller_Sept_2017.pngSteve Miller | Co-Founder of Emerald Network Initiative
Director of the Healthy Weight Initiative, Harvard T.H. Chan School of Public Health

Steve was the co-founder of Boston's Hub On Wheels Bike festival and was subsequently a Gubernatorial appointee on the state’s Bicycle and Pedestrian Advisory Board. He was Board Chair of TechBoston Academy, a public pilot high school whose achievements were honored by a visit from President Barak Obama in 2010, and led Mass Networks’ NetDay Campaigns that mobilized over 20,000 volunteers across the state to help network schools for technology-facilitated education reform – leading to an invitation to present at President Clinton's 1999 National Education Summit. Previously, working with state union leaders, he helped found the Massachusetts’ Coalition for Occupational Health & Safety, which just celebrated its 45th year. He has also worked in high tech, helping with the start-up of Lotus Development Corporation then, after a fellowship at the Kennedy School of Government, becoming Director of Strategic Planning for the Commonwealth’s Office of Management Information Systems. Steve has served on the national boards of Computer Professionals for Social Responsibility (CPSR), the Consortium for School Networks (CoSN), and as chair of Grassroots International (GRI). Miller has published four books on public policy, hosted a radio discussion show, and was the on-screen Science & Technology Commentator for a national cable network. He currently publishes a weekly blog titled, “The Public Way: Transportation, Health, and Livable Communities.” 


Julia Africa
Greg Bialecki
Alice Brown
Michelle Ciccolo
Jeff Cook
Marc Draisen
Alex Krieger
Lee Moreau
Gretchen Rabinkin
Kishore Varanasi