Cassandra Ely

Director, MethaneSAT


Areas of expertise:
Climate change, methane, air quality, natural gas, local distribution systems, data visualization, technology innovation, and geoengineering

Cassie Ely is Director of MethaneSAT. She leads new and innovative environmental sensing and data collection projects from conceptualization and data collection through to results visualization, public communication, and advocacy.

Previously at EDF, Cassie served as project lead for air quality mapping in Oakland, outfitting Google Street View cars with air quality sensors to map air pollution in cities at the hyperlocal level. She formerly lead the methane mapping project, another partnership with Google Earth Outreach to map methane leaks from local distribution systems around the nation. She also managed EDF’s emerging air pollutant mapping and sensor projects. In addition to the mapping projects, Cassie managed the Solar Radiation Management Governance Initiative, a partnership between EDF, TWAS, and the Royal Society to foster international dialogue on global geoengineering governance.


Prior to joining Environmental Defense Fund, Cassandra served as an energy and environmental policy legislative analyst with the Delaware State Senate. She also worked as a business and policy analyst for the U.S. Energy Information Administration.


  • Master’s in Energy and Environmental Policy, University of Delaware
  • Bachelor of Science in Zoology and Anthropology, University of Wisconsin