tansy massey-green

Tansy Massey-Green

Senior Associate
  • US Program

Tansy is a senior associate on the US Program Cities team, supporting RMI’s Brightfields Accelerator aimed at helping communities consider deploying clean energy in brownfields and closed landfills. She also co-leads the America’s Federal Funding Opportunities and Resources for Decarbonization (AFFORD) tool designed to help subnationals navigate federal funding opportunities.


Tansy joined the Cities team after spending two and a half years in RMI’s America Is All In team, where she led the Inflation Reduction Act Implementation work for the coalition. America Is All In is a coalition of thousands of states, cities, businesses, and nonprofits in pursuit of ambitious climate action. In 2023, Tansy co-led the Cash In on Clean Energy Tour, a series of in-person events organized to help subnationals navigate the new clean energy tax credits.

Prior to joining RMI, Tansy worked at the World Wildlife Fund and the Union of Concerned Scientists.


B.S., Ecology and Evolutionary Biology, Environmental Studies, University of Michigan